Chapter 8

1.

1 point

A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the routing table that matches the destination network for this packet, what does the router do next?

performs a recursive lookup to find the exit interface used to forward the packet

searches for a default route to forward the packet

sends a request to neighboring routers for the location of the 128.107.0.0 network

drops the packet since the static route does not have an exit interface

2.

1 point

What occurs when no ip classless is implemented on the router?

The router will use a default route, if present, when a matching route is not found in the routing table.

The router will only support classful routing protocols.

The router will only support classful IP addressing.

The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.

3.

1 point

The following entry is displayed in the routing table:
R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1
What type of route is this?

a level 1 ultimate network route

a level 2 child route

a level 1 supernet route

a level 1 parent route

a level 2 ultimate child route

4.

1 point

A router has the following entries in its routing table:
S 192.168.0.0/24 [1/0] via 192.168.128.2
O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1
D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0
R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1
The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?

the RIP route

the OSPF route

the EIGRP route

the static route

5.

1 point

10.0.0.0/27 is subnetted, 2 subnets
R 10.16.1.0 [120/1] via 192.168.1.1,00:00:06, Serial0/0/0
R 10.16.1.64 [120/1] via 192.168.1.6, 00:00:25, Serial0/0/1
S* 0.0.0.0/0 is directly connected, Serial0/0/0

Router rip, version 2, network 192.168.1.0, no auto-summary

Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?

drop the packet

forward the packet via the route to 10.16.1.64

use the default route

forward the packet via the route to 10.16.1.0

6.

1 point

172.16.0.0/24 subnetted, 3 subnets
172.16.1.0
172.16.2.0
172.16.3.0
192.168.1.0
S8 0.0.0.0/0 is directly connected, Serial 0/0/1

Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?

drop the packet

send packet to network 0.0.0.0

send packet out Serial 0/0/1

send packet out FastEthernet 0/0

7.

1 point

Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped?

issue the ip default-network command

issue the ip classless command

use a classful routing protocol such as RIPv1

do nothing, ip classless is on by default

enable either OSPF or ISIS as the routing protocol

8.

1 point

JAX# show ip route

C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, Serial0/0/0
R 192.168.3.0/24 [120/1] via 192.168.2.2, 00:00:12, Serial0/0/0
JAX#

Refer to the exhibit. What can be determined from this output?

A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.

All of the routes listed are network routes.

The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.

The parent route for these networks was removed from the routing table.

9.

1 point

Router1# show ip route

-output omitted-

Gateway of last resort is not set

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.4.0/24 is directly connected, FastEthernet0/0
S 172.16.0.0/16 is directly connected, Serial0/0/1
C 192.168.1.0/24 is directly connected, Serial0/0/1

Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?

sent to default gateway

forward out interface Serial0/0/1

they are dropped

forward out interface FastEthernet 0/0

10.

1 point

E# show ip route

172.16.0.0/25 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/0
172.17.0.0/25 is subnetted, 1 subnets
R 172.17.1.0/17 [120/1] via 172.16.1.2, 00:00:11, FastEthernet0/0
172.18.0.0/16 is subnetted, 1 subnets
S 172.18.1.0 is directly connected, Serial0/0
S* 0.0.0.0/0 [1/0] via 10.0.0.5
E#

Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet toforward. Which route in the routing table will be searched first and why?

0.0.0.0/0 because it is the lowest network number

172.16.1.0/25 because it is the first ultimate route

172.18.0.0/15 because it has the shortest mask

172.16.0.0/25 because it is the first level 1 route

11.

1 point

172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
R 172.16.1.4/30 [120/1] via 172.16.2.1, 00:00:10, Serial0/0/0
R 172.16.1.8/30 [120/1] via 172.16.2.1, 00:00:12 Serial0/0/1
C 172.16.3.0/24 is directly connected, FastEthernet0/0

Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?

RIPv1

OSPF

RIPv2

EIGRP

12.

1 point

What determines if the router implements a classless route lookup process?

Routing table entries have a next-hop IP address and an exit interface for each child route.

Multiple routes with different masks to the same destination are in the routingtable.

Child routes are present in the routing table.

A classless routing protocol has been configured on the router.

The command ip classless is enabled on the router.

13.

1 point

172.16.0.0/24 is subnetted, 2 subnets
C 172.16.2.0 is directly connected, FastEthernet0/0
C 172.16.3.0 is directly connected, FastEthernet0/1
C 198.18.8.0/22 is directly connected, Serial0/0/0

Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?

255.255.255.0

255.255.255.255

0.0.0.0

255.255.0.0

14.

1 point

ORL# show ip route

Gateway of last resort is not set
172.16.0.0/24 is subnetted, 3 subnets
S 172.16.4.0 [1/0] via 192.168.2.2
S 172.16.3.0 [1/0] via 192.168.2.2
S 172.16.2.0 [1/0] via 192.168.2.2
C 192.168.2.0/24 is directly connected, Serial0/0/0
R 192.168.3.0/24 [120/1] via 192.168.2.2, 00:00:21, Serial0/0/0
C 192.168.4.0/24 is directly connected, Serial0/0/1

Refer to the exhibit. Which statement correctly describes this network?

192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes

Traffic going to 172.16.3.0 will be directed to s 0/0/1

EIGRP is being used

There is at least one parent and one child route

15.

1 point

A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?

the route with the smallest AD

the route with the longest address and mask match to the destination

the route with the highest bandwidth

the route with the best combination of AD and lowest cost

16.

1 point

<-output omitted->
172.16.0.0/24 is subnetted, 4 subnets
S 172.16.4.0 is directly connected, Serial0/0/1
R 172.16.1.0 [120/1] via 172.16.2.1, 00:00:08, Serial0/0/0
C 172.16.2.0 is directly connected, Serial0/0/0
C 172.16.3.0 is directly connected, FastEthernet0/0
10.0.0.0/16 is subnetted, 1 subnets
S 10.1.0.0 is directly connected, Serial0/0/1
C 192.168.1.0/24 is directly connected, Serial0/0/1
S 192.168.100.0/24 is directly connected, SErial0/0/1
<-output omitted->

7

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3

6

17.

1 point

A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?

administrative distance

route prefix

metric

update timer

18.

1 point

The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?

ip default-network 0.0.0.0

no ip classless

ip classless

ip route 0.0.0.0 0.0.0.0 Serial 0/0/1

ip default-gateway 172.16.254.1

19.

1 point

172.16.3.8/24 Fa0/0
172.16.1.4/30 S0/0/1
172.16.1.8/30 S0/0/0

Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?

172.16.0.0/16

172.16.0.0/30

172.16.0.0/24

172.16.1.0/24

172.16.1.0/16