ICDN voucher

ecco

Which protocol is used by e-mail servers to communicate with each other?
FTP
HTTP
TFTP
SMTP ***
POP
SNMP

2
Which command displays the active configuration file of a router?
Display startup-config
Display running-config
Show running-config ***
Show startup-config

3
What are the two basic functions used by a router to relay packets?
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
Filtering and switching
Path determination and filtering
Path determination and switching ***
Traffic analysis and filtering

4
Which of the following are advantages of using a static route? (Choose three.)
secure operation
highly adaptable
low maintenance configuration ***
low processor overhead ***
precise control of path selection ***

5
Which of the following are TCP services? (Choose three.)
address resolution
end-to-end communication ***
flow control ***
reliability of data delivery ***
path determination
data representation

6
What is the purpose of media access control?
It identifies which workstation has sent a frame.
It determines which Layer 3 protocol should handle a frame.
It identifies which Ethernet frame format to use on the network.
It determines which workstation on a shared medium LAN is allowed to transmit data. ***

7
Which of the following IP addresses are broadcast addresses if the subnet mask is 255.255.255.240? (Choose three.)
75.32.75.15 ***
205.16.35.11
199.254.129.111 ***
129.130.17.143 ***
135.22.55.93
105.33.62.213

8
What is the default state of the interfaces on a router?
up, line protocol down
down, line protocol down
adminstratively down, line protocol down ***
up, line protocol up

9
How many bits are in IPv6 addresses?
16
32
64
96
128 ***
258

10
Which OSI layer defines the functions of a router?
physical
data link
network ***
transport
session

11
What are the primary uses of Telnet? (Choose two.)
routing of data packets
transfer of data between end users
verification of application layer connectivity ***
connecting to remote network devices ***

12
Routers have different types of memory. Choose the answer that describes flash memory.
provides working storage
stores a fully functional IOS image ***
stores the startup configuration file
initializes the code used to boot the router

13


Which of the following is true regarding CDP and the graphic shown?
CDP running on Router D will gather information about routers A, B, C, and E.
By default, Router A will receive CDP advertisements from routers B and C. ***
If routers D and E are running different routing protocols, they will not exchange CDP information.
Router E can use CDP to identify the IOS running on Router B.

14
Which of the following describes path determination at the network layer?
router compares available ARP table information to select the best path
router uses routed protocol to determine the best path for data transmission
router compares available routing table information to select the best path ***
router uses a routing protocol to compare LAN equipment to route data through
switch compares available routing table information to select the best path

15
Which command turns on a router interface?
Router(config-if)# enable
Router(config-if)# no down
Router(config-if)# s0 active
Router(config-if)# interface up
Router(config-if)# no shutdown ***

If dynamic routing is not configured on a router, how do routing table updates occur?
Link state advertisements are sent from other routers.
Updates are made to the routing table by the administrator. ***
Best path information is communicated by network hosts.
The routing table is updated by neighboring routers.

17
What does TCP use to begin the three-way handshaking process?
The destination host sends an ACK segment.
The sending host sends a SYN segment. ***
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
The sending host sends a SYN and ACK segment.
The destination host sends a SYN segment.

18
Which statement accurately describes the way DHCP assigns IP addresses?
The network administator must re-assign a previously assigned address to the DHCP pool once a host no longer requires it.
DHCP offers a many-to-one ratio of IP addresses to users.
DHCP only allows users to obtain IP addresses if users have a profile in the DHCP pool.
DHCP has the ability to reclaim an IP address after a host workstation releases it. ***

19
Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask?
binary adding
hexadecimal anding
binary division
binary multiplication
binary ANDing ***

20
At which layer of the TCP/IP model does Telnet operate?
application ***
presentation
session
transport
internet
network access

ecco

21
Four concurrently running Telnet connections have been initiated. Which commands would enable the network administrator to view all of them? (Choose two.)
Router> show configuration
Router> show connections
Router> show sessions ***
Router# show configuration
Router# show connections
Router# show sessions

22
How many IP addresses can be assigned to host devices on each subnet of a Class B network with a subnet mask of 255.255.255.248?
3
5
6 ***
8
30
8190

23


Pings between Atlanta and Dallas are successful. If a hostname table or DNS connection is not available, which command will successfully establish a remote connection from Atlanta to Dallas via Telnet?
Atlanta> connect Dallas
Atlanta> 197.72.3.2 ***
Atlanta# 206.157.85.1
Atlanta# telnet Dallas

24
When does a distance vector routing protocol set a hold-down timer on a route?
when the metric value of the route decreases
when the route is marked as inaccessible ***
when the metric value for the route improves
when a regular update is received from a neighboring router

25
Which of the following is considered to be a multi-port bridge?
hub
switch ***
router
repeater

26
All numbering systems have a beginning or first digit and an end or last digit. Select the first and last digits representing Base 16, hexadecimal. (Choose two.)
0 ***
A
9
F ***
15

27
Which of the following protocols operate at the application layer of the OSI model? (Choose two.)
FTP ***
TCP
UDP
HTTP ***

28
Which transport layer unit of information places the port number in the header?
data
segment ***
packet
frame
bit

29
For which condition will the ARP protocol be used?
The destination IP address is unknown. ***
The destination MAC address is unknown.
The source IP address is unknown.
The source MAC address is unknown.

30
Which protocol can be used to load or retrieve Cisco IOS images to or from a router?
SNMP
TFTP ***
UDP
TCP

31

What command enables CDP on the interface of a router?
Router(config-if)# cdp enable ***
Router(config-if)# cdp run
Router(config-if)# cdp start
Router(config-if)# cdp config

32


After issuing the command traceroute 192.168.4.2 from Router A, the following information is returned.

Tracing the route to Router_D (192.168.4.2)
1 Router_B (192.168.2.2) 16 msec 16 msec 16 msec
2 * * *
3 * * *

What can be concluded about the network shown in the graphic based on the output given?
Network 192.168.5.0 is missing from the routing table on Router A.
There is a problem with the connection between Router B and Router C. ***
Router C is not running CDP.
Some of the routers are non-Cisco devices.
Router B was not able to return ICMP TEMs to Router A.

33
What happens to a MAC address in a frame as it passes from router to router on its way to its destination?
Nothing, it remains the same.
MAC addresses are not passed from router to router.
It changes from router to router. ***
It keeps the MAC address of the first router it passes through.

34
An administrator has made routing protocol changes to a router's configuration. To ensure that the changes are implemented, the active configuration is saved and the router is reloaded. After the router has initialized, the output on the screen displays "Would you like to enter the initial configuration dialog?[yes/no]:" Why did this dialog appear?
There was a POST failure.
The incorrect IOS loaded.
There was an error in the startup configuration file.
The configuration register was set to ignore NVRAM. ***

35
Which criteria identify a Class B address? (Choose two.)
decimal number in first octet between 127 - 191
decimal number in first octet between 128 - 192
decimal number in first octet between 128 - 191 ***
first bit of binary IP address is 0
first two bits of binary IP address are 10 ***
first three bits of binary IP address are 110

36
Which of the following show commands would display the ******** of the IOS boot image?
show flash
show NVRAM
show version ***
show running-config
show startup-config

37
What is the purpose of the IOS enable secret command?
To allow the user to establish password protection on incoming Telnet sessions
To allow the user to establish password protection on the console terminal
To enable the user to access the User mode
To enable the user to enter a password that will be encrypted ***

38
Which of the following describes shared media environment?
a collision free environment made up of systems on the same medium
multiple hosts have access to the same cable ISP system
multiple hosts have access to the same medium. ***
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
multiple router environment in a mesh topology

39
What is the purpose of Positive Acknowledgment and Retransmission (PAR)?
PAR allows the presentation layer to request that data be resent in a format the destination host can process.
PAR provides a mechanism for the receiving device to request that all segments be retransmitted if one segment is corrupt.
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
PAR helps ensure that a number of data segments sent by one host are received by another host before additional data segments are sent. ***
PAR is used to renegotiate the window size during the synchronization process.

40
Which of the following describes the function of the Domain Name Service system?
It associates IP addresses to domain names. ***
It associates MAC addresses to domain names.
It associates DHCP addresses to domain names.
It associates TCP port numbers to domain names.

ecco

41
Which device imposes boundaries on broadcast traffic?
bridge
repeater
router ***
transceiver

42


The graphic depicts two workstations attached to two different hubs that are separated by a repeater. How many collision domains exist in this scenario?
one ***
two
three
four
five

43
Which TCP/IP layer provides services that support a logical connection between the sending and receiving hosts?
application
network
IP
transport ***
presentation
session

44
What is the maximum distance that 10BASE-T will transmit data before signal attenuation affects the data delivery?
100 meters ***
185 meters
300 meters
500 meters

45
Which of the following types of networks pass a token sequentially to each host? (Choose two.)
Ethernet
Token Ring ***
FDDI ***
Frame Relay
ISDN

46

Identify the correct pairing of protocols and their classifications.
Routed - IP, IGRP
Routed - RIP, OSPF
Routing - IPX, RIP
Routing - OSPF, IGRP ***

47
Which Ethernet data link layer frame comparison is correct?
higher speed networks require more fields be included in the frame
the faster speed frame structures are incompatible with the slower speed networks
the frame structure changes with each higher speed, however, they are compatible with slower speeds
all speeds of Ethernet have nearly identical frame structures ***

48
Which switching mode describes a switch that transfers a frame as soon as the destination MAC address is read?
fragment-free
cut-through ***
store-and-forward
latency forwarding

49
Which TCP/IP model layer supports both LAN and WAN technologies?
network access layer
internet layer ***
transport layer
application layer

50
What is the first step a Cisco router performs after it is powered up?
Empties contents of NVRAM
Looks for the configuration file
Performs a POST ***
Starts the operating system

51
Which of the following are functions of RAM? (Choose three.)
contains startup configuration file
stores routing table ***
holds fast switching cache ***
retains contents when power is removed
stores running configuration file ***

52
How does a network device determine a collision has occurred on an Ethernet network?
The voltage of the signal on the networking media will increase. ***
The voltage of the signal on the networking media will decrease.
The voltage of the signal on the networking media will remain the same.
The voltage of the signal on the networking media will increase and decrease rapidly.

53
If a network node is connected to a switch port using full-duplex transmission, which of the following conditions exists?
a two-node collision domain
no collision domain ***
a multi-port collision domain
no broadcast domain
a two-node broadcast domain

54
Given the IP address 10.122.200.77 and subnet mask 255.255.255.224, what is the subnet address?
10.0.0.0
10.0.0.32
10.0.0.64
10.122.200.0
10.122.200.32
10.122.200.64 ***

55
Which command will display routing table information about all known networks and subnetworks?
Router# show ip interfaces
Router# show ip connections
Router# show ip route ***
Router# show ip networks

56
Which of the following statements describe distance vector routing updates? (Choose three.)
Topology changes are transmitted to all routers at once.
Routers send their entire routing tables in distance vector updates. ***
Path cost metrics for each route are included in the updates. ***
Periodic updates are sent directly to every router in the network.
Routing updates are sent periodically to adjacent routers. ***
Routers send only the state of their own links in distance vector updates.

57
How many Telnet sessions can take place simultaneously on a router running a standard edition of the IOS?
4
5 ***
8
10

58
What type of routing uses information that is manually entered into the routing table?
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
dynamic
interior
static ***
standard

59
Which two statements are true regarding ICMP? (Choose two.)
ICMP provides reliability for the TCP/IP protocol stack.
ICMP is a component of the TCP/IP protocol stack.
ICMP notifies the sender that data transmission errors have occurred. ***
ICMP is connection-oriented.
ICMP messages are propagated to all intermediate devices. ***
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

60
Which of the following are benefits of creating a subnetwork structure in an IP network? (Choose three.)
permits network address duplication
allows for address flexibility ***
prevents address replication
provides broadcast containment ***
adds low-level security ***
allows for more network hosts available

ecco

What is accomplished by segmenting a LAN with a bridge?

*increase large collision domains

reduce large collision domains

reduce small broadcast domains

increase small broadcast domains



2
How many Telnet sessions can take place simultaneously on a router running a standard edition of the IOS?
4
*5
8
10



3
What is a disadvantage of cut-through switching?

*no error checking

a decrease in error checking

decrease in number of collision domains

decrease in bandwidth

increased latency



4
Which of the following are data link layer encapsulation details? (Choose two.)

*Packets are put into frames.

Data is packaged into a packet.

Data is segmented into segments.

Data is converted for Internet travel.

*An address is added to identify the directly connected device.



5
Select the characteristics specified by 10BaseT. (Choose three.)

*twisted pair cable

T style connectors

*baseband transmission

10 gigabits per second data rate

*10 megabits per second data rate

decimal encoded data transmission



6
A LAN is to be added to an unused router Ethernet interface. What steps must be performed to configure this interface to allow connectivity to the hosts on this LAN? (Choose two.)

*Enter the command no shutdown.

A password must be set on the interface.

The interface DCE clock rate must be set.

The interface must be configured for virtual terminal access.

*The interface must be configured with an IP address and subnet mask.

The router must be put in setup mode in order for the interface to be configured.



7
Which media types can be used in an implementation of a 10BASE-T network? (Choose three.)

Category 5 UTP *
Category 5e UTP *
Category 3 UTP *
coaxial cable
multi-mode fiber
single mode fiber


8
If 4 bits are borrowed from the host field of a Class C address to create subnets, what will the range of usable host addresses be in the last subnet?
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

.224 to .239

.225 to .239

.225 to .254

.241 to .254

.241 to .255

*.240 to .255



9
Which of the following describe how a device on a LAN builds a table of MAC addresses? (Choose two.)

by monitoring the traffic that occurs on the local network segment

*via FTP from the nearest router

*by sending a request to the nearest domain name server

by broadcasting an ARP request



10
Which of the following best describes how the Gigabit Ethernet, Media Access Control method views the link?

ring
shared bus
point-to-point *
star
extended star



11
What is the purpose of Positive Acknowledgment and Retransmission (PAR)?

PAR allows the presentation layer to request that data be resent in a format the destination host can process.

PAR provides a mechanism for the receiving device to request that all segments be retransmitted if one segment is corrupt.

*PAR helps ensure that a number of data segments sent by one host are received by another host before additional data segments are sent.

PAR is used to renegotiate the window size during the synchronization process.



12
Which criteria identify a Class B address? (Choose two.)

decimal number in first octet between 127-191

decimal number in first octect between 128-192

*decimal number in first octect between 128-191
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

first bit of binary IP address is 0

*first two bits of binary IP address are 10

first three bits of IP binary address are 110



13
An administrator has made routing protocol changes to a router's configuration. To ensure that the changes are implemented, the active configuration is saved and the router is reloaded. After the router has initialized, the output on the screen displays "Would you like to enter the initial configuration dialog?[yes/no]:" Why did this dialog appear?

There was a POST failure.

The incorrect IOS loaded.

There was an error in the startup configuration file.

*The configuration register was set to ignore NVRAM.



14
What operations are performed during router initialization? (Choose three.)

*The IOS is loaded into RAM.

The generic bootstrap loader tests all interfaces.

All directly connected network devices are identified.

*A valid configuration file is loaded from NVRAM if specified by the configuration register.

*A question driven setup menu is presented if a valid configuration file cannot be loaded.



15
For a network manager planning the installation of a new network, which of the following will be needed to implement a typical 10BASE-T network installation? (Choose three.)

RJ-11
BNC connectors
RJ-48 patch cables
RJ-45 connectors *
Category 5 UTP cables *
hubs or switches *


16. A company with a Class B license needs to have a minimum of 1,000 subnets with each subnet capable of accommodating 50 hosts. Which mask below is the appropriate one?

255.255.0.0

255.255.240.0

255.255.255.0

*255.255.255.192

255.255.255.224



17
A network administrator can establish a remote session to a host using the Router> telnet 192.168.1.1 command but is unsuccessful when using the Router> telnet Boston command to connect to the same interface. Which of the following could be the problem? (Choose two.)

*The ip host table on the router is not configured.

The command telnet Boston was issued from the wrong router prompt.

The routing table is missing.

*Domain name services are not available.



18
Which of the following network components would be considered Layer 1 devices? (Choose three.)

*hub

router

bridge

switch

*repeater

*transceiver



19
What is the maximum distance that 10BASE-T will transmit data before signal attenuation affects the data delivery?

*100 meters

185 meters

300 meters

500 meters



20
What is the result of executing the erase startup-config command?

It deletes the active configuration file from RAM.

*It deletes the backup configuration file in NVRAM.

It deletes the saved configuration file from ROM.

It deletes the saved configuration file from the C:\ drive.

ecco

21
Which of the following imposes boundaries on broadcast traffic?

Bridge

Repeater

*Router

Transceiver



22
Which utility shows the route a packet takes to reach its destination?

netstat

ping

Telnet

*traceroute



23
Which device is considered a multi-port bridge?

hub

router

*switch

gateway
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

transceiver

repeater



24
What organization developed the TCP/IP reference model?

Internet Engineering Task Force (IETF)
National Intstitute of Standards and Technology (NIST)
Department of the Navy (DoN)
Department of Defense (DoD) *
Massachusetts Institute of Technology (MIT)
Stanford University



25 Which of the following is true regarding CDP and the graphic shown?

CDP running on Router D will gather information about routers A, B, C, and E.

By default, Router A will receive CDP advertisements from routers B and C.

*If routers D and E are running different routing protocols, they will not exchange CDP information.

Router E can use CDP to identify the IOS running on Router B.



26
How would an administrator configure a static route for use if a primary route failed?

configure the route with a metric greater than the default value

configure the route and the router will activate it as needed

configure the route to activate by using the redistribute static command

*configure the route with an administrative distance greater than the default value



27
Convert the Hexadecimal number A2 into its Base 10 equivalent. Select the correct answer from the list below.

156

158

160

*162

164

166



28
*What happens on an Ethernet network after a collision occurs? (Choose three.)

A backoff algorithm is invoked and transmission is stopped.

Devices involved in the collision have a random period of time for priority retransmission of the damaged packet.

The devices involved in the collision release a token indicating the time each station may begin retransmitting.

*The devices involved in the collision do not have priority to transmit data.

*The devices with data to transmit return to a listen-before-transmit mode.

Transmit work will restart with the reissuance of all data.



29
Which of the following types of networks pass a token sequentially to each host? (Choose two.)

Ethernet

*Token Ring

*FDDI

Frame Relay

ISDN



30
What is the length of a MAC address?

8 bits

8 bytes

24 bits

24 bytes

*48 bits

48 bytes


31 Which of the following are TCP services? (Choose three.)

address resolution

end-to-end communication

*flow control

reliability of data delivery

path determination

*data representation



32
Routers have different types of memory. Choose the answer that describes RAM.

provides working storage

*stores a fully functional IOS image

stores the startup configuration file

initializes the code used in router startup



33
Which command will display routing table information about all known networks and subnetworks?

Router# show ip interfaces

Router# show ip connections

*Router# show ip route

Router# show ip networks



34
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
Which of the following statements describe distance vector routing updates? (Choose three.)

Topology changes are transmitted to all routers at once.

Routers send their entire routing tables in distance vector updates.

*Path cost metrics for each route are included in the updates.

Periodic updates are sent directly to every router in the network.

*Routing updates are sent periodically to adjacent routers.

*Routers send only the state of their own links in distance vector updates.



35
Which ICMP message type notifies source hosts that a receiving host or network is not available?

time exceeded

********

*destination unreachable

source quench

parameter problem

echo reply



36
How many total subnets are created by applying the subnet mask 255.255.252.0 to a Class B network?

4

6

*64

252

255

1024



37
Which of the following conditions will cause a router using holddown timers to ignore an update?

an update from a different router with a better metric

an update from a different router with a poorer metric

an update from the same router with a better metric

*an update from the same router with a poorer metric



38
Which IP packet field will prevent endless loops?

type-of-service

identification

flags

*time-to-live

header checksum



39
Which of the following is a network type that is widely used in dialup networking?

shared media

point-to-point

extended shared media

*point-to-multipoint



40
When a network administrator applies the subnet mask 255.255.255.248 to a Class A address, for any given subnet, how many IP addresses are available to be assigned to devices?

1022

510

254

126

30

*6

ecco

41
Cisco Discovery Protocol (CDP) operates at which OSI Layer?

physical layer

network layer

*data link layer

presentation layer



42
Which protocol can be used to load or retrieve Cisco IOS images to or from a router?

SNMP

*TFTP

UDP

TCP



43
Which of the following is a transport layer protocol of the TCP/IP model?

FTP

*UDP

IP

TFTP



44
Which of the following is created with switched full-duplex transmission?

more collision domains

fewer collision domains

*no collision domains

no increase in broadcast domains

more broadcast domains



45
Which of the following IP addresses are broadcast addresses if the subnet mask is 255.255.255.240? (Choose three.)

*75.32.75.15

205.16.35.11

*199.254.129.111

*129.130.17.143

135.22.55.93

105.33.62.213


46 What type of routing uses information that is manually entered into the routing table?

dynamic

interior

*static

standard
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427



47
What is used to resolve known IP addresses to unknown MAC addresses?

*ARP

DNS

DHCP

RARP



48
Which of the following OSI layers offers reliable, connection-oriented data communication services?

session

*transport

network

data link



49
Which of the following are benefits of creating a subnetwork structure in an IP network? (Choose three.)

permits network address duplication

*allows for address flexibility

*prevents address replication

provides broadcast containment

*adds low-level security

allows for more network hosts available



50
How many IP addresses can be assigned to host devices on each subnet of a Class B network with a subnet mask of 255.255.255.248?

3

5

6

8

30

8190???? mayby that



51
After a Telnet session has been suspended, which actions will restart the session? (Choose two.)

pressing Enter to restart the most recent session

using the resume command followed by a session ID

*typing the session ID followed by pressing Enter

*using the resume command followed by the IP address



52
Which layer of the OSI model covers physical media?

*Layer 1

Layer 2

Layer 3

Layer 4

Layer 5

Layer 6



53
Which protocol is used by FTP to transfer files over the Internet?

*TCP

SMTP

UDP

SNMP



54
Which of the following factors should be considered when selecting a routing protocol to be implemented in an enterprise network? (Choose three.)

*bandwidth consumption

*router memory requirements

router ********

spanning tree size

*router processor capability

flow control capability



55


A ping 192.1.1.20 command is issued on workstation A to determine if workstation B can be reached. What events will occur if this command is successful? (Choose two.)

*The router will block the ping request message.

The router will reply to the echo request with a proxy ping response.

Workstation A will send a UDP ping request message to workstation B.

Workstation B will send a UDP ping reply message to workstation A.

*Workstation A will send an ICMP echo request message to workstation B.

Workstation B will send an ICMP echo reply message to workstation A.



56
Which mode will a router enter if it is unable to locate a valid startup configuration file during the boot process?

Boot mode

Config mode

Setup mode

Startup mode



57
Which protocol of the TCP/IP model internet layer provides connectionless, best-effort-delivery of datagrams?

ARP

ICMP

IP

RARP

*TCP

DNS



58
Which of the following does a router use to make a forwarding decision?

*destination IP address

MAC address

source IP address

encapsulation address

default gateway



59
Routers have different types of memory. Choose the answer that describes NVRAM.

provides working storage

*stores a fully functional IOS image
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

stores the startup configuration file

initializes the code that is used to boot the router



60
Which statement is correct concerning routing and routed protocols?

A routed protocol allows the routers to communicate with other routers and maintain tables for a routing protocol.

A routing protocol allows routers to communicate with other routers and maintain tables for a routed protocol.

*Routers only need to use routing protocols to work properly.

ecco

1 ¿Qué protocolo se puede usar para cargar o almacenar imágenes Cisco IOS en o desde un router?

SNMP
TFTP
UDP
TCP


2 ¿Cuáles son las dos funciones básicas que utiliza el router para enviar un paquete que recibe?

Filtrado y conmutación
Determinación de ruta y filtrado
Determinación de ruta y conmutación
Filtrado y análisis de tráfico


3 ¿Cuáles de las siguientes alternativas son servicios que provee TCP? (Elija tres opciones).

resolución de direcciones
comunicación de extremo a extremo
control de flujo
confiabilidad en la entrega de datos
determinación de ruta
representación de datos
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427


4 ¿Qué comando muestra la información acerca de todas las redes y subredes conocidas de la tabla de enrutamiento?

Router# show ip interfaces
Router# show ip connections
Router# show ip route
Router# show ip networks


5 Todo sistema de numeración contiene un número definido de dígitos. El sistema decimal contiene los dígitos que van desde el 0 hasta el 9. Seleccione el dígito inicial y el dígito final del sistema hexadecimal (Base 16). (Elija dos opciones).

0
A
9
F
15



6 ¿Cuál es el protocolo que usan los servidores de correo electrónico para comunicarse entre sí?

FTP
HTTP
TFTP
SMTP
POP
SNMP


7 ¿Cuál es el proceso que usan los routers para determinar la dirección de subred basándose en una dirección IP y una máscara de subred determinadas?

adición binaria
operación AND hexadecimal
división binaria
multiplicación binaria
operación AND binaria


8 ¿Cuáles de las siguientes frases describen lo que son las actualizaciones de enrutamiento por vector-distancia? (Elija tres opciones).

Los cambios de topología se transmiten a todos los routers al mismo tiempo.
Los routers envían sus tablas de enrutamiento completas en las actualizaciones por vector-distancia.
Las métricas de costo para cada ruta se incluyen en las actualizaciones.
Las actualizaciones periódicas se envían directamente a cada uno de los routers de la red.
Las actualizaciones de enrutamiento se envían periódicamente a los routers adyacentes.
Los routers envían sólo el estado de sus propios enlaces en las actualizaciones por vector-distancia.


9 ¿Qué comando activa una interfaz de router?

Router(config-if)# enable
Router(config-if)# no down
Router(config-if)# s0 active
Router(config-if)# interface up
Router(config-if)# no shutdown


10 ¿Cuál de las capas TCP/IP suministra servicios que admiten una conexión lógica entre los hosts emisores y receptores?

aplicación
red
IP
transporte
presentación
sesión

11 ¿Cuál de las capas del modelo TCP/IP soporta tanto tecnologías de LAN como de WAN?

capa de acceso de red
capa de Internet
capa de transporte
capa de aplicación


12 ¿Cuáles de las siguientes afirmaciones son verdaderas con respecto a ICMP? (Elija dos opciones).

ICMP proporciona confiabilidad para la pila de protocolo TCP/IP.
ICMP es un componente de la pila de protocolo TCP/IP.
ICMP notifica al remitente que se han producido errores de transmisión de datos.
ICMP está orientado a conexión.
Los mensajes de ICMP se propagan a todos los dispositivos intermedios.





13

Después de emitir el comando traceroute 192.168.4.2 desde el router A, se devuelve la siguiente información.

Tracing the route to Router_D (192.168.4.2)
1 Router_B (192.168.2.2) 16 msec 16 msec 16 msec
2 * * *
3 * * *

¿Qué conclusión se puede sacar sobre la red que aparece en el gráfico sobre la base del resultado dado?

Falta la red 192.168.5.0 de la tabla de enrutamiento en el Router A.
Hay un problema con la conexión entre el Router B y el Router C.
El Router C no ejecuta CDP.
Algunos de los routers no son dispositivos de Cisco.
El router B no pudo devolver TEM de ICMP al Router A.


14 ¿En cuál de las capas del modelo TCP/IP opera Telnet?

de aplicación
de presentación
de sesión
de transporte
Internet
de acceso de red

15 ¿Cuándo un protocolo de enrutamiento de vector-distancia establece un temporizador de tiempo de espera para una ruta?

cuando el valor de la métrica de la ruta disminuye
cuando la ruta se marca como inaccessible
cuando el valor de la métrica de la ruta mejora
cuando se recibe una actualización periódica desde un router vecino


16 ¿Cuáles son los criterios que se usan para identificar una dirección Clase B? (Elija dos opciones).

número decimal en el primer octeto entre 127-191
número decimal en el primer octeto entre 128-192
número decimal en el primer octeto entre 128-191
el primer bit de la dirección IP binaria es 0
los primeros dos bits de la dirección IP binaria son 10
los primeros tres bits de la dirección IP binaria son 110

17 Dada la dirección IP 10.122.200.77 y la máscara subred 255.255.255.224, ¿cuál es la dirección de subred?

10.0.0.0
10.0.0.32
10.0.0.64
10.122.200.0
10.122.200.32
10.122.200.64


18 ¿Qué clase de enrutamiento utiliza información que se introduce a la tabla de enrutamiento de forma manual?

dinámico
interior
estático
estándar


19 ¿Cuál es la distancia máxima que una red 10BASE-T puede transmitir datos sin que la atenuación los afecte?

100 metros
185 metros
300 metros
500 metros


20 ¿Cuáles de las siguientes opciones representan ventajas en la creación de una estructura de subredes en una red IP? (Elija tres opciones).

permite la duplicación de direcciones de red
permite la flexibilidad de direcciones
evita la repetición de direcciones
proporciona contención de broadcast
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
agrega seguridad de bajo nivel
permite la disponibilidad de más host de red

ecco

21 Un administrador de red ha realizado cambios de protocolo de enrutamiento en la configuración de un router. Para asegurarse de que se implementen los cambios, la configuración activa se guarda y se reinicia el router. Después de inicializarse el router, el resultado en la pantalla dice "Would you like to enter the initial configuration dialog?[yes/no]:" ¿Por qué aparece este diálogo?

Hubo una falla de POST.
Se cargó el IOS incorrecto.
Hubo un error en el archivo de configuración inicial.
El registro de configuración se configuró para pasar por alto a la NVRAM.


22 ¿Cómo determina un dispositivo de red que ha ocurrido una colisión en una red Ethernet?

El voltaje de la señal en los medios de networking aumenta.
El voltaje de la señal en los medios de networking disminuye.
El voltaje de la señal en los medios de networking sigue igual.
El voltaje de la señal en los medios de networking aumenta y disminuye rápidamente.






23 ¿Cuál es el propósito del control de acceso los medios?

Identifica la estación de trabajo que envió una trama.
Determina cuál de los protocolos de la Capa 3 debe manejar una trama.
Identifica cuál formato de trama Ethernet se debe usar en la red.
Determina a cuál de las estaciones de trabajo que se encuentran en una LAN de medios compartidos se le permite transmitir datos.


24 ¿Cuál de las siguientes opciones describe la función del sistema de Servicio de Denominación de Dominio?

Asocia las direcciones IP con los nombres de dominio.
Asocia las direcciones MAC con los nombres de dominio.
Asocia las direcciones DHCP con los nombres de dominio.
Asocia los números de puerto TCP con los nombres de dominio.


25 ¿Cuáles de las siguientes direcciones IP son direcciones de broadcast si la máscara de subred es 255.255.255.240? (Elija tres opciones).

75.32.75.15
205.16.35.11
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
199.254.129.111
129.130.17.143
135.22.55.93
105.33.62.213


26 Identifique la clasificación de protocolo que corresponda correctamente a los protocolos indicados.

Enrutado - IP, IGRP
Enrutado - RIP, OSPF
Enrutamiento - IPX, RIP
Enrutamiento - OSPF, IGRP


27

Los pings entre Atlanta y Dallas tienen éxito. Si no se encuentra disponible ni una tabla de nombre de host ni una conexión DNS, ¿qué comando establecerá con éxito una conexión remota desde Atlanta a Dallas mediante Telnet?

Atlanta> connect Dallas
Atlanta> 197.72.3.2
Atlanta# 206.157.85.1
Atlanta# telnet Dallas







28 ¿Cuántas sesiones de Telnet pueden ejecutarse simultáneamente en un router que ejecuta una edición estándar del IOS?

4
5
8
10


29


¿Cuál de las siguientes opciones es verdadera con respecto a CDP y el gráfico que se muestra?

Ejecutar CDP en el Router D reúne información acerca de los routers A, B, C y E.
Por defecto, el Router A recibe publicaciones CDP desde los routers B y C.
Si los routers D y E ejecutan diferentes protocolos de enrutamiento, no intercambiarán información CDP.
El router E puede usar CDP para identificar el IOS que se ejecuta en el Router B.


30 ¿Cuál de los siguientes comandos show muestra la ubicación de la imagen IOS de arranque?

show flash
show NVRAM
show version
show running-config
show startup-config


31 ¿Cuál es el primer paso que realiza un router Cisco al encenderse?

Elimina el contenido de la NVRAM
Busca el archivo de configuración
Ejecuta un POST
Inicia el sistema operativo


32 Se han iniciado cuatro conexiones Telnet concurrentes. ¿Cuáles de los siguientes comandos permiten que el administrador de red las visualice? (Elija dos opciones)

Router> show configuration
Router> show connections
Router> show sessions
Router# show configuration
Router# show connections
Router# show sessions


33 ¿Cuál de los siguientes modos de conmutación describe un switch que empieza a transmitir una trama apenas lee la dirección MAC destino?

libre de fragmentos
por método de corte
de almacenamiento y envío
envío de latencia


34 ¿Cuáles son los usos principales de Telnet? (Elija dos opciones).

enrutamiento de paquetes de datos
transferencia de datos entre usuarios finales
verificación de la conectividad de la capa de aplicación
conexión a dispositivos de red remotos


35 ¿Cuántas direcciones IP se pueden asignar a dispositivos host en cada subred de una red Clase B con una máscara de subred de 255.255.255.248?
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

3
5
6
8
30
8190


36 ¿Cuáles de las siguientes opciones son ventajas de utilizar una ruta estática? (Elija tres.)

operación segura
altamente adaptable
configuración de bajo mantenimiento
gasto reducido de procesador
control preciso de la selección de ruta


37 ¿Qué usa TCP para iniciar el proceso de intercambio de señales de tres vías?

El host destino envía un segmento ACK.
El host emisor envía un segmento SYN.
El host emisor envía un segmento SYN y ACK.
El host destino envía un segmento SYN.


38 ¿Cuáles de los siguientes protocolos operan en la capa de aplicación del modelo OSI? (Elija dos opciones).
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

FTP
TCP
UDP
HTTP


39 ¿Qué comando habilita CDP en la interfaz de un router?

Router(config-if)# cdp enable
Router(config-if)# cdp run
Router(config-if)# cdp start
Router(config-if)# cdp config


40 ¿Cuál de las siguientes afirmaciones describe la determinación de ruta en la capa de red?

el router compara la información de la tabla ARP disponible para seleccionar la mejor ruta
el router usa el protocolo enrutado para determinar la mejor ruta para transmitir datos
el router compara la información disponible en la tabla de enrutamiento para seleccionar la mejor ruta
el router usa un protocolo de enrutamiento para comparar el equipo LAN a través del cual se enrutarán los datos
el switch compara la información disponible en la tabla de enrutamiento para seleccionar la mejor ruta

ecco

41 Si no se configura el enrutamiento dinámico en un router, ¿cómo se actualizan las tablas de enrutamiento?

Se envían publicaciones de estado de enlace desde los demás routers.
El administrador realiza las actualizaciones a la tabla de enrutamiento.
La información de mejor ruta es comunicada por los hosts de red.
La tabla de enrutamiento es actualizada por los routers vecinos.


42 ¿Cuál es el estado por defecto de las interfaces de un router?

activadas, protocolo de línea desactivado
desactivadas, protocolo de línea desactivado
administrativamente desactivadas, protocolo de línea desactivado
activadas, protocolo de línea activado

43 Los routers tienen diferentes tipos de memoria. Elija la respuesta que describe la memoria flash.

proporciona el almacenamiento de trabajo
almacena una imagen IOS totalmente funcional
almacena el archivo de configuración inicial
inicializa el código utilizado para arrancar el router


44 ¿Cuál de las siguientes comparaciones de trama de la capa de enlace de datos Ethernet es correcta?

las redes de alta velocidad requieren que se incluyan más campos en la trama
las estructuras de trama de velocidades más altas son incompatibles con las redes de velocidades más lentas
la estructura de trama cambia con cada velocidad más alta, sin embargo, son compatibles con las velocidades más lentas
todas las velocidades de Ethernet tienen estructuras de trama prácticamente idénticas


45 ¿Cuál de las siguientes declaraciones describe la forma en la que DHCP asigna las direcciones IP?

El administrador de red debe reasignar una dirección asignada previamente al grupo DHCP una vez que el host ya no la necesite.
DHCP brinda una relación de una a varias direcciones IP para los usuarios.
DHCP sólo permite que los usuarios obtengan direcciones IP si los usuarios tienen un perfil en el grupo DHCP.
DHCP tiene la capacidad de recuperar una dirección IP después que una estación de trabajo host lo libera.


46 ¿Cuál es el propósito del acuse de recibo positivo y retransmisión (PAR)?

PAR permite que la capa de presentación solicite que se reenvíen los datos en un formato que el host destino puede procesar.
Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427
PAR proporciona un mecanismo para que el dispositivo receptor solicite que todos los segmentos se retransmitan si un segmento está dañado.
PAR ayuda a garantizar que la cantidad de segmentos de datos enviados por un host sean recibidos por otro host antes de que se envíen segmentos de datos adicionales.
PAR se utiliza para renegociar el tamaño de la ventana durante el proceso de sincronización.


47 ¿Qué sucede a una dirección MAC dentro de una trama a medida que pasa de un router a otro en su camino hacia el destino?

Nada, sigue siendo igual.
Las direcciones MAC no se pasan de un router a otro.
Cambia a medida que pasa de un router a otro.
Mantiene la dirección MAC del primer router por el que ha pasado.


48 ¿Cuál de los siguientes dispositivos impone límites en el tráfico de broadcast?

puente
repetidor
router
transceptor


49 ¿Cuál de las capas OSI define las funciones del router?

física
de enlace de datos
de red
de transporte
de sesión


50 ¿Cuál PDU ubica el número de puerto en el encabezado?

datos
segmento
paquete
trama
bit


51 ¿Cuál de las siguientes condiciones se genera con una transmisión full-duplex conmutada?

más dominios de colisión
menos dominios de colisión
ningún dominio de colisión
ningún aumento en los dominios de broadcast
más dominios de broadcast


52 ¿Cuál de las siguientes situaciones describe el entorno de medios compartidos?

un entorno sin colisiones conformado por sistemas en el mismo medio
múltiples hosts tienen acceso al mismo sistema ISP de cables
múltiples hosts tienen acceso al mismo medio.
entorno de múltiples routers en una topología de malla


53 ¿Cuáles de las siguientes alternativas son funciones de la memoria RAM de un router? (Elija tres.)

contiene el archivo de configuración de inicio
almacena la tabla de enrutamiento
contiene el caché de conmutación rápida
retiene el contenido si se corta la energía
almacena el archivo de configuración activo


54 ¿Cuáles de los siguientes dispositivos se consideran un puente multipuerto?

hub
switch
router
repetidor

Kaynak: Wardom http://www.wardom.com.tr/showthread.php?t=74427

55 ¿Cuántos bits tienen las direcciones IPv6?

16
32
64
96
128
258


56 ¿Cuál es el propósito del comando IOS enable secret ?

Permitir al usuario establecer una protección mediante contraseña para las sesiones Telnet entrantes.
Permitir al usuario establecer una protección mediante contraseña para el terminal de consola.
Permitir al usuario acceder al modo Usuario
Permitir al usuario introducir una contraseña que quedará cifrada


57

El gráfico muestra dos estaciones de trabajo conectadas a dos hubs distintos separados por un repetidor. En esta situación, ¿cuántos dominios de colisión existen?

uno
dos
tres
cuatro
cinco


58 ¿Qué comando muestra la configuración activa de un router?

display startup-config
display running-config
show running-config
show startup-config
59 ¿En cuáles de los siguientes tipos de red los hosts transmiten un token en forma secuencial? (Elija dos opciones).

Ethernet
Token Ring
FDDI
Frame Relay
ISDN


60 ¿En cuál de las siguientes situaciones se utilizará el protocolo ARP?

Se desconoce la dirección IP destino.
Se desconoce la dirección MAC destino.
Se desconoce la dirección IP origen.
Se desconoce la dirección MAC origen.