Set of flashcards CCNA2 Chapters 1-11 (Page 3 of 7)

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Language	Deutsch
Category	Computer Science
Level	Other
Created / Updated	07.01.2013 / 24.09.2020
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What metric does the RIP routing protocol consider to be infinity?

0

15

16

224

255

What does the RIP holddown timer do?

ensures an invalid route has a metric of 15

prevents a router from sending any updates after it has introduced a routing loop into the network

ensures every new route is valid before sending an update

instructs routers to ignore updates, for a specified time or event, about possible inaccessible routes

Refer to the exhibit. What path will packets from the 192.168.1.0/24 network travel to reach the 10.0.0.0/8 network if RIP is the active routing protocol?

The path will be router A -> router B -> router C -> router E.

The path will be router A -> router D -> router E

Router A will load balance between the router A -> router D -> router E and router A -> router B -> router C -> router E path

Packets will alternate paths depending on the order they arrive at router A.

Three routers running a distance-vector routing protocol lost all power, including the battery backups. When the routers reload, what will happen?

They will share all routes saved in NVRAM prior to the power loss with their directly connected neighbors.

They will multicast hello packets to all other routers in the network to establish neighbor adjacencie

They will send updates that include only directly connected routes to their directly connected neighbor

They will broadcast their full routing table to all routers in the networ

What is a routing loop?

a packet bouncing back and forth between two loopback interfaces on a route

a condition where a return path from a destination is different from the outbound path forming a “loop”

a condition where a packet is constantly transmitted within a series of routers without ever reaching its intended destination

the distribution of routes from one routing protocol into another

Which statement is true regarding cisco’s RIP_JITTER variable?

It prevents the synchronization of routing updates by buffering the updates as they leave the router interface

It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update

It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time

It prevents the synchronization of routing updates by forcing the router to listen when its time for other updates on the lines before sending it

Which statement is true regarding cisco’s RIP_JITTER variable?

It prevents the synchronization of routing updates by buffering the updates as they leave the router interface

It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update

It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time

It prevents the synchronization of routing updates by forcing the router to listen when its time for other updates on the lines before sending it

Which three routing protocols are distance vector routing protocols? (Choose three).

RIPv1

EIGRP

OSPF

IS-IS

RIPv2

Which of the following can exist in a distance vector network that has not converged? (Choose three).

routing loops

inconsistent traffic forwarding

no traffic forwarding until system converges

inconsistent routing table entries

routing table updates sent to wrong destinations

What is the purpose of the TTL field in the IP header?

used to mark routes as unreachable in updates sent to other routers

prevents regular update messages from reinstating a route that may have gone bad

prevents a router from advertising a network through the interface from which the update came

limits the time or hops that a packet can traverse through the network before it should be discarded

defines a maximum metric value for each distance vector routing protocol by setting a maximum hop count

Refer to the exhibit. The network that is shown is running RIPv1. The 192.168.10.0/24 network was recently added and will only contain end users. What command or set of commands should be entered on Router1 to prevent RIPv1 updates from being sent to the end user devices on the new network while still allowing this new network to be advertised to other routers?

Router1(config-router)# no router rip Router1(config-router)# network 192.168.10.0

Router1(config-router)# no network 192.168.10.0

Router1(config-router)# passive-interface fastethernet 0/0

Router1(config-router)# passive-interface serial 0/0/0

Refer to the output from the show ip route command. What can be concluded from the output of this router command?

A preferred route to the destination has not been set.

There are two equal cost paths to network 1.0.0.0.

Both interfaces are being used equally to route traffic.

A variance must be set to load-balance across multiple paths.

Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still in the Router1 routing table. How much longer will Router1 keep the down network in its routing table before marking it as possibly down?

30 seconds

90 seconds

155 seconds

180 seconds

255 seconds

What is the default update period in seconds for the RIP routing protocol?

10

12

15

20

30

Which of the following is considered a limitation of RIP v1?

RIP v1 does not send subnet mask information in its updates.

RIP v1 is not widely supported by networking hardware vendors.

RIP v1 consumes excessive bandwidth by multicasting routing updates using a Class D address.

RIP v1 requires enhanced router processors and extra RAM to function effectively.

RIP v1 does not support load balancing across equal-cost paths.

Which command will display RIP activity as it occurs on a router?

debug ip rip

show ip route

show ip interface

show ip protocols

debug ip rip config

What are three characteristics of the RIPv1 routing protocol? (Choose three.)

supports the use of VLSM

uses hop count as a metric

considers a metric of 16 as infinity

includes the destination IP address and subnet mask in routing updates

calculates metrics using the Bellman Ford algorithm

Which of the following would be the correct command sequence to enable RIP on Router B for all connected networks?

RouterB(config)# router rip RouterB(config-router)# network 198.16.4.0

RouterB(config-router)# network 211.168.74.0 RouterB(config-router)# network 199.84.32.0

RouterB(config)# configure router rip RouterB(config-router)# network 210.36.7.0 RouterB(config-router)# network 199.84.32.0 RouterB(config-router)# network 211.168.74.0

RouterB(config)# router rip RouterB(config-router)# network 198.16.4.0 RouterB(config-router)# network 210.36.7.0 RouterB(config-router)# network 211.168.74.0

RouterB(config)# router rip RouterB(config-router)# network 198.16.4.0 RouterB(config-router)# network 210.36.7.0 RouterB(config-router)# network 220.17.29.0

Refer to the exhibit. All routers are configured with valid interface addresses in the indicated networks and are running RIPv1. The network is converged. Which routes are present in the routing tables?

All routers have all routes in their routing table.

All routers have all /30 routes, but do not have /24 routes in their routing table.

All routers have all /30 routes. Routers A and E also have some of the /24 routes in their routing table.

All routers have all /30 routes. Routers B and D also have some of the /24 routes in their routing table.

Routers A and E have all routes. Routers B and D have only /30 routes in their routing table.

What will happen if an interface IP address is entered for the addressportion of the network command in a RIPv1 configuration instead of a network address?

The router will reject the command.

A route to the host address will be added to outgoing RIP updates.

A route to the host address will be added to the routing table.

All interfaces in the same classful network as the configured address will be included in the RIPv1 routing process.

Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network administrator configures the command network 10.1.0.0 on Router1. What network will Router1 advertise to Router2?

10.1.0.0/16

10.1.0.0/8

10.0.0.0/16

10.0.0.0/8

Refer to the exhibit. All routers in the exhibit are running RIP v1. The network administrator issues the show ip route command on router A. What routes would appear in the routing table output if the network is converged? (Choose two).

R 192.168.2.0/24 [120/1]

C 192.168.2.0/24 [120/1]

R 10.10.3.0/24 [120/0]

C 10.10.3.0/24 [120/1]

R 10.10.1.0/24 [120/2]

Refer to the exhibit. A network consists of multiple routers. What can be verified when the show ip protocols command is issued on one of the routers in the network?

whether all routes in the network have been properly added to the routing table

routing protocol configuration in use for IP on this router

operational status of routing protocols in use on all routers in the network

routing metric of each network that is listed in the routing table

Refer to the exhibit. What can be concluded from the routing table output of router B?

A static default route has been configured on B.

The default-information originate command has been entered on A.

All traffic that is destined for 192.168.1.1 will be sent to address 0.0.0.0.

Hosts on the 10.16.1.0/27 network have 192.168.1.1 configured as the default gateway address.

The following line was displayed in the output of the show ip route command. R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0 What is the value of the routing metric?

3

12

20

30

120

Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended to have both a default route and the default-information originatecommand issued to implement this forwarding policy?

only Router1

only the gateway router

all routers in the network

only the routers with LANs needing Internet access

Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort?

no auto-summary

ip default-network 0.0.0.0

ip default-gateway 10.0.0.0

ip route 0.0.0.0 0.0.0.0 S0/0/1

Which command or set of commands will stop the RIP routing process?

RouterB(config)# router rip RouterB(config-router)# shutdown

RouterB(config)# router rip RouterB(config-router)# network no 192.168.2.0

RouterB(config)# no router rip

RouterB(config)# router no rip

Which two statements are true regarding the characteristics of RIPv1? (Choose two).

It is a distance vector routing protocol.

It advertises the address and subnet mask for routes in routing updates.

The data portion of a RIP message is encapsulated into a TCP segment.

The data portion of a RIP message is encapsulated into a UDP segment.

It broadcasts updates every 15 seconds.

Refer to the exhibit. RIPv1 is running on all three routers. All interfaces have been correctly configured with addresses in the address ranges that are shown. Which route would you see in the routing table on router CHI if the routers are configured with the commands that are displayed in the exhibit?

192.168.0.4/30

192.168.0.0/24

192.168.0.0/16

192.168.0.32/27

Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still valid in the routing table of Router1. How much longer will it take for Router1 to mark the route invalid by setting the metric to 16?

30 seconds

90 seconds

155 seconds

180 seconds

255 seconds

What two advantages does CIDR provide to a network? (Choose two.)

reduced routing table size

dynamic address assignment

automatic route redistribution

reduced routing update traffic

automatic summarization at classful boundaries

Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?

192.168.4.3/29

192.168.4.15/29

192.168.4.65/26

192.168.4.255/24

In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?

3

4

12

36

84

Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)

32-bit address

next hop router interface

subnet mask

unicast host address

Layer 2 address

Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?

255.255.255.192

255.255.255.224

255.255.255.240

255.255.255.248

255.255.255.252

What does VLSM allow a network administrator to do?

utilize one subnet mask throughout an autonomous system

utilize multiple subnet masks in the same IP address space

utilize IGRP as the routing protocol in an entire autonomous system

utilize multiple routing protocols within an autonomous system

Which three interior routing protocols support VLSM? (Choose three.)

OSPF

RIP v1

RIP v2

EIGRP

BGP

Which of the following problems does VLSM help to alleviate?

the shortage of IP addresses

the difficulty of assigning static IP addresses to hosts in large enterprises

the complexity of implementing advanced routing protocols such as OSPF and EIGRP

the shortage of network administrators qualified in the use of RIP v1 and IGRP

Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results:
1. pings from R1 to the S0/0/0 interface on R2….successful
2. pings from R1 to the Fa0/0 interface on R2….successful
3. pings from host B to hosts on the 10.1.1.0/24 network….successful
4. pings from host B to the Fa0/0 interface on R2….successful
5. pings from R2 to host B….successful.

What is the likely cause of the failure of the ping from R1 to host B?

The default gateway on host B is not correctly set.

There are no routes back to networks connected to R1 from R2.

There is a Layer 2 problem between R2 and host B.

Host B has a defective Ethernet card.

CCNA2 Chapters 1-11

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