CCNA2:ch1-3

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Diese Lernkarten bieten eine umfassende Einführung in die Grundlagen der Netzwerkkonfiguration und -verwaltung auf Berufslehre-Niveau. Sie konzentrieren sich auf Routerkonfiguration, IP-Adressierung, Routing-Tabellen und Netzwerkprotokolle wie CDP. Die Karteikarten behandeln auch statische Routen, Paketverarbeitung und Troubleshooting-Techniken. Netzwerkadministratoren und IT-Fachleute, die ihre Kenntnisse in der Netzwerkverwaltung vertiefen möchten, profitieren von diesen Lernkarten, da sie praktische Einblicke in die Konfiguration und Fehlerbehebung von Netzwerken bieten.

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24.07.2013 / 05.05.2017

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If a router cannot find a valid configuration file during the startup sequence, what will occur?

The startup sequence will reset.

The router will prompt the user for a response to enter setup mode.

The startup sequence will halt until a valid configuration file is acquired.

The router will generate a default configuration file based on the last valid configuration.

The router will monitor local traffic to determine routing protocol configuration requirements.

Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)

VTY interface

console interface

Ethernet interface

secret EXEC mode

privileged EXEC mode

Which two statements correctly describe the components of a router? (Choose two.)

ROM contains diagnostics executed on hardware modules.

NVRAM stores a backup copy of the IOS used during the boot sequence.

Flash memory does not lose its contents during a reboot.

ROM contains the most current and most complete version of the IOS.

Flash contains boot system commands to identify the location of the IOS

What is the outcome of entering these commands?
R1(config)# line vty 0 4 R1(config-line)# password check123
R1(config-line)# login

ensures that a password is entered before entering user EXEC mode

sets the password to be used for connecting to this router via Telnet

requires check123 to be entered before the configuration can be saved

creates a local user account for logging in to a router or switch

What three processes does a router execute when it receives a packet from one network that is destined for another network? (Choose three.)

decapsulates the Layer 3 packet by stripping off the Layer 2 frame header

uses the destination MAC Address in the IP Header to look up the next-hop address in the routing table

leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet

uses the destination IP Address in the IP header to look up the next-hop address in the routing table

encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface

The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?

serial

straight-through

roll-over

crossover

Which two statements describe characteristics of load balancing? (Choose two.)

Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing allows a router to forward packets over multiple paths to the same destination network.

Unequal cost load balancing is supported by EIGRP.

If multiple paths with different metrics to a destinations exist, the router cannot support load balancing.

From what location can a router load the Cisco IOS during the boot process? (Choose two.)

tftp server

setup routine

nvram

flash memory

terminal

A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?

Router1# copy running-config flash

Router1# copy running-config startup-config

Router1(config)# copy running-config startup-config

Router1# copy startup-config running-config

Router1(config)# copy startup-config running-config

What is the default sequence for loading the configuration file?

NVRAM, FLASH, ROM

FLASH, TFTP,CONSOLE

NVRAM, TFTP, CONSOLE

FLASH, TFTP, ROM

What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?

only the Layer 2 source address

only the Layer 2 destination address

the Layer 3 source and destination address

only the Layer 3 destination address

the Layer 2 source and destination address

A static route that points to the next hop IP will have what administrative distance and metric in the routing table?

administrative distance of 0 and metric of 0

administrative distance of 0 and metric of 1

administrative distance of 1 and metric of 0

administrative distance of 1 and metric of 1

What address can be used to summarize networks 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24, and 172.16.4.0/24?

172.16.0.0/21

172.16.1.0/22

172.16.0.0 255.255.255.248

172.16.0.0 255.255.252.0

The routers in the diagram use the subnet assignments shown. What is the most efficient route summary that can be configured on Router3 to advertise the internal networks to the cloud?

192.1.1.0/26 and 192.1.1.64/27

192.1.1.128/25

192.1.1.0/24

192.1.1.0/25

192.1.1.0/24 and 192.1.1.64/24

A network administrator enters the following command into Router1: ip route 192.168.0.0 255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet?

drops the packet because the destination host is not listed in the routing table

looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame

performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet

encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface

Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)

ping

show arp

traceroute

show interface

show ip route

Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)

load

platform

reliability

holdtime

local interface

What happens to a static route entry in a routing table when the outgoing interface is not available?

The route is removed from the table.

The router polls neighbors for a replacement route.

The route remains in the table because it was defined as static.

The router redirects the static route to compensate for the loss of the next hop device.

A router has one static route to each destination network. Which two scenarios would require an administrator to alter the static routes that are configured on that router? (Choose two.)

The destination network no longer exists.

The destination network is moved to a different interface on the same router.

The path between the source and destination is upgraded with a higher bandwidth link.

A topology change occurs where the existing next-hop address or exit interface is not accessible.

The remote destination network interface has to be down for 15 minutes of maintenance.

Why is it advisable to enter a next-hop IP address when creating a static routewhose exit interface is an Ethernet network?

Adding the next-hop address eliminates the need for the router to do any lookups in the routing table before forwarding a packet.

In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address.

Using a next-hop address in a static route provides a route with a lower metric.

In multi-access networks, using a next-hop address in a static route makes that route a candidate default route.

The output of the Router# show interfaces serial 0/1 command displays the following:
Serial0/1 is up, line protocol is down.
What is the most likely cause for the line protocol being down?

Serial0/1 is shutdown.

There is no cable connecting the routers.

The remote router is using serial 0/0.

No clock rate has been set.

What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).

the serial port of the router

a modem

the ethernet port of the router

a CSU/DSU device

a DTE device

Which two statements describe functions or characteristics of CDP? (Choose two.)

It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.

It operates at the network layer and allows two systems to learn about each other.

It creates a topology map of the entire network.

It allows systems to learn about each other even if different network layer protocols are configured.

It forwards advertisements about routes for faster convergence.

Which piece of information is available from examining the output of the command show ip interface brief?

Interface speed and duplex

Interface MTU

Interface MAC address

Interface IP address

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