CCNA Chapter #8
CCNA: Routing Protocols & Concepts. Chapter 8. The Routing Table: A closer look.
- 1.
Refer to the exhibit. What can be determined from this output?
- A.
The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.
- B.
The parent route for these networks was removed from the routing table.
- C.
A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.
- D.
All of the routes listed are network routes.
Correct Answer
D. All of the routes listed are network routes. -
- 2.
Refer to the exhibit. 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?
- A.
Searches for a default route to forward the packet
- B.
Drops the packet since the static route does not have an exit interface
- C.
Performs a recursive lookup to find the exit interface used to forward the packet
- D.
Sends a request to neighboring routers for the location of the 128.107.0.0 network
Correct Answer
C. Performs a recursive lookup to find the exit interface used to forward the packet -
- 3.
Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
- A.
172.16.0.0/16
- B.
172.16.0.0/24
- C.
172.16.0.0/30
- D.
172.16.1.0/16
Correct Answer
A. 172.16.0.0/16 -
- 4.
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, Serial0/0/1What type of route is this?
- A.
A level 1 parent route
- B.
A level 1 supernet route
- C.
A level 1 ultimate network route
- D.
A level 2 child route
- E.
A level 2 ultimate child route
Correct Answer
C. A level 1 ultimate network route -
- 5.
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?
- A.
Issue the ip default-network command
- B.
Use a classful routing protocol such as RIPv1
- C.
Enable either OSPF or ISIS as the routing protocol
- D.
Issue the ip classless command
- E.
Do nothing, ip classless is on by default
Correct Answer
E. Do nothing, ip classless is on by default -
- 6.
Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
- A.
Drop the packet
- B.
Forward the packet via the route to 10.16.1.0
- C.
Forward the packet via the route to 10.16.1.64
- D.
use the default route
- E.
Explode
Correct Answer
D. use the default route -
- 7.
Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?
- A.
3
- B.
4
- C.
5
- D.
8
- E.
7
Correct Answer
E. 7 -
- 8.
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?
- A.
Drop the packet
- B.
send packet out Serial 0/0/1
- C.
Send packet to network 0.0.0.0
- D.
Send packet out FastEthernet 0/0
- E.
Send the packet in a loop until the TTL expires
Correct Answer
B. send packet out Serial 0/0/1 -
- 9.
Refer to the exhibit. Which statement correctly describes this network?
- A.
EIGRP is being used
- B.
There is at least one parent and one child route
- C.
192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes
- D.
Traffic going to 172.16.3.0 will be directed to s 0/0/1
Correct Answer
B. There is at least one parent and one child route -
- 10.
Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?
- A.
They are dropped
- B.
Sent to default gateway
- C.
Forward out interface Serial0/0/1
- D.
Forward out interface FastEthernet 0/0
Correct Answer
C. Forward out interface Serial0/0/1 -
- 11.
Refer to the exhibit. 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?
- A.
Ip classless
- B.
No ip classless
- C.
Ip default-network 0.0.0.0
- D.
Ip default-gateway 172.16.254.1
- E.
Ip route 0.0.0.0 0.0.0.0 s0/0/1
Correct Answer
A. Ip classless -
- 12.
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, Serial0/0/1The 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?
- A.
The static route
- B.
The OSPF route
- C.
The EIGRP route
- D.
The RIP route
- E.
No route. packet will be dropped
Correct Answer
D. The RIP route -
- 13.
What determines if the router implements a classless route lookup process?
- A.
Child routes are present in the routing table.
- B.
A classless routing protocol has been configured on the router.
- C.
The command ip classless is enabled on the router.
- D.
Multiple routes with different masks to the same destination are in the routing table.
- E.
Routing table entries have a next-hop IP address and an exit interface for each child route.
Correct Answer
C. The command ip classless is enabled on the router. -
- 14.
What occurs when no ip classless is implemented on the router?
- A.
The router will only support classful IP addressing.
- B.
The router will only support classful routing protocols.
- C.
The router will use a default route, if present, when a matching route is not found in the routing table.
- D.
The router will assume it has knowledge of all subnets in the network and will not search beyond child
- E.
Routes for a better match.
Correct Answer
D. The router will assume it has knowledge of all subnets in the network and will not search beyond child -
- 15.
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 to forward. Which route in the routing table will be searched first and why?
- A.
172.16.1.0/25 because it is the first ultimate route
- B.
0.0.0.0/0 because it is the lowest network number
- C.
172.16.0.0/25 because it is the first level 1 route
- D.
172.18.0.0/15 because it has the shortest mask
- E.
No route is searched.. IOS version 12.3 is not supported.
Correct Answer
C. 172.16.0.0/25 because it is the first level 1 route -
- 16.
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?
- A.
The route with the smallest AD
- B.
The route with the longest address and mask match to the destination
- C.
The route with the highest bandwidth
- D.
The route with the best combination of AD and lowest cost
Correct Answer
B. The route with the longest address and mask match to the destination -
- 17.
Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?
- A.
0.0.0.0
- B.
255.255.0.0
- C.
255.255.255.0
- D.
255.255.255.255
- E.
255.0.0.0
Correct Answer
C. 255.255.255.0 -
- 18.
Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?
- A.
RIPv1
- B.
RIPv2
- C.
EIGRP
- D.
OSPF
- E.
IS-IS
Correct Answer
B. RIPv2 -
- 19.
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?
- A.
Metric
- B.
Route prefix
- C.
Update timer
- D.
Administrative distance
Correct Answer
D. Administrative distance -
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Jul 30, 2011Quiz Edited by
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Nov 15, 2009Quiz Created by
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