An Interesting Quiz On CCNA Chapter 8
The Cisco Certified Network Associate (CCNA) program is here to give you the tools needed to gain an understanding on the inner workings of networking theory, and today we’ll be taking a look at some of the topics explored in the curriculum. Welcome to an interesting quiz on CCNA Chapter 8!
- 1.
Refer to the exhibit .what protocol was used to distribute the routing information for the network 172.16.1.4?
- A.
RIPV1
- B.
RIP V2
- C.
EIGRP
- D.
OSPF
Correct Answer
B. RIP V2Explanation
The correct answer is RIP V2. This can be determined by looking at the exhibit, which suggests that the network is using the Routing Information Protocol (RIP) to distribute routing information. The "V2" in the answer indicates that it is referring to RIP Version 2, which is an enhanced version of the protocol with added features and improvements over RIP Version 1.Rate this question:
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- 2.
What determines if the router implements a classless route lookup process ?
- A.
Child routes are present in the routing table.
- B.
The command ip classless is enabled on the router
- C.
A classless routing protocol has been configured on the router
- D.
Routing table entries have a next-hop IP address and an exit interface for each child route
Correct Answer
B. The command ip classless is enabled on the routerExplanation
The command "ip classless" enables the router to implement a classless route lookup process. This command allows the router to forward packets to a more specific network address, even if it does not have a matching route entry in its routing table. Without this command, the router would only forward packets based on the classful network address, ignoring any subnet information. Therefore, enabling the "ip classless" command is necessary for the router to perform classless route lookup.Rate this question:
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- 3.
Refer to the exhibit. What subnet mask will Route1 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
Correct Answer
C. 255.255.255.0Explanation
Route1 will apply a subnet mask of 255.255.255.0 to the child routes of the 172.16.0.0/24 network. This subnet mask allows for 256 IP addresses in the network, with the last octet being used for host addresses.Rate this question:
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- 4.
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.
Use the default route
- C.
Forward the packet via the route to 10.16.1.0
- D.
Forward the packet via the route to 10.16.1.64
Correct Answer
B. Use the default routeExplanation
Router B will use the default route. Since the destination address of the packet (10.16.1.97) does not match any specific route in the routing table, the router will use the default route as a fallback option to forward the packet. The default route is a pre-configured route that is used when there is no specific route available for the destination address.Rate this question:
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- 5.
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 192.168.40 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 routeExplanation
The given exhibit does not provide enough information to determine if EIGRP is being used or not. However, it does indicate that there is at least one parent and one child route in the network. Additionally, it states that the networks 192.168.2.0, 192.168.3.0, and 192.168.40 are child routes. Lastly, it mentions that traffic going to 172.16.3.0 will be directed to s 0/0/1.Rate this question:
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- 6.
Refer to the exhibit.Router1 has been issued the ip classless command.what happens to packets destined ot host 172.16.3.10?
- A.
They are dropped
- B.
Sent to default gateway
- C.
Forward out interface serial 0/0/1
- D.
Forward out interface FastEthernet 0/0
Correct Answer
C. Forward out interface serial 0/0/1Explanation
When the router has been issued the "ip classless" command, it means that the router will use classless routing protocols such as OSPF or EIGRP. In this case, the router will forward packets destined to host 172.16.3.10 out of the interface serial 0/0/1.Rate this question:
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- 7.
Refer to the exhibit .what cna 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 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 routesExplanation
From the given output, it can be determined that all of the routes listed are network routes. This means that the router has specific routes for each network mentioned in the routing table, and it does not rely on a default or supernet route to forward packets. There is no information provided regarding recursive lookups, removal of parent routes, or classification of a specific route as a supernet route.Rate this question:
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- 8.
Refer to the exhibit. With the ip classless command issued,what will routre 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
Correct Answer
B. Send packet out serial 0/0/1Explanation
With the "ip classless" command issued, router R2 will send the packet out serial 0/0/1 if it is destined for host 172.16.4.234. This command allows the router to forward packets to a specific interface instead of dropping them when a more specific route is not available.Rate this question:
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- 9.
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 highest bandwidth
- B.
The route with the smallest Administrative Distance
- C.
The route with the longest address and mask match to the destination
- D.
The route with the best combination of Administrative Distance and lowest cost
Correct Answer
C. The route with the longest address and mask match to the destinationExplanation
When a packet needs to be forwarded, the first criterion used to determine the best path in the routing table is the route with the longest address and mask match to the destination. This means that the router will look for the most specific match between the destination IP address and the routes in the routing table. By selecting the route with the longest address and mask match, the router ensures that the packet is forwarded to the most specific destination, optimizing the routing process.Rate this question:
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- 10.
Refer to the exhbit .How many routes in this output qualify for use as ultimate routes ?
- A.
3
- B.
4
- C.
5
- D.
6
- E.
7
Correct Answer
E. 7 -
- 11.
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 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 routes for a better match .Explanation
When no "ip classless" is implemented on the router, it means that the router will not support classless IP addressing. This means that the router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match. In other words, the router will not be able to dynamically calculate the best route for a given destination based on the subnet mask. Instead, it will rely on the pre-configured routes and will not search for more specific routes if a matching route is not found in the routing table.Rate this question:
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- 12.
Refer to the exhibit. Router1 is running IOS version 12.2. what will the network administrator need to doso that packets for unknown child routess of 172.16.0.0/24 will not be dropped ?
- A.
Issue the ip defauly 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 defaultExplanation
The correct answer is "do nothing, ip classless is on by default." This means that the network administrator does not need to take any additional steps to ensure that packets for unknown child routes of 172.16.0.0/24 are not dropped. The "ip classless" command is enabled by default in IOS version 12.2, allowing the router to forward packets to the best matching route, even if it is a child route of a larger network. Therefore, the router will automatically handle packets for unknown child routes without any additional configuration.Rate this question:
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- 13.
A route to a destination netowkr is learned from multiple routing protocols .what is used by 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 distanceExplanation
The administrative distance is used by Cisco routers to select the preferred route to a destination that will be installed in the routing table. It is a numerical value assigned to each routing protocol, indicating the trustworthiness or reliability of that protocol. When multiple routing protocols provide routes to the same destination, the router will choose the route with the lowest administrative distance, as it is considered more reliable.Rate this question:
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- 14.
Refer to the exhibit >what parent netowork will automically 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
- E.
172.16. 1.0/24
Correct Answer
A. 172.16.0.0/16Explanation
The parent network that will automatically be included in the routing table when the three subnets are configured on Router1 is 172.16.0.0/16. This is because it covers a larger range of IP addresses compared to the other subnets listed. The /16 subnet mask allows for 65,536 IP addresses, while the other subnets have smaller ranges. Therefore, the 172.16.0.0/16 network will encompass all the other subnets and be included in the routing table.Rate this question:
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- 15.
Refer to the exhibit.The network administrator has discovered that packets destined for servers on the 17.16.254.0 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 0 network 0.0.0.0
- D.
Ip default-gatewat 172.16.254.1
- E.
Ip route 0.0.0.0 0.0.0.0 serial 0/0/1
Correct Answer
A. Ip classlessExplanation
The correct answer is "ip classless". This command enables the router to forward packets to a default gateway if a more specific route is not available in the routing table. By enabling "ip classless", the router will be able to send packets destined for the 17.16.254.0 network out the gateway of last resort, which in this case is Serial 0/0/1.Rate this question:
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- 16.
Refer to the exhibit .The graphic contains partial contents of 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 beacuse it has the shortest mask
Correct Answer
C. 172.16.0.0/25 because it is the first level 1 routeExplanation
The correct answer is 172.16.0.0/25 because it is the first level 1 route. In a routing table, routes are typically organized in a hierarchical manner based on their level. Level 1 routes are more specific and have a longer prefix length compared to level 2 routes. When a packet needs to be forwarded, the router will search for the most specific route first, which in this case is the level 1 route 172.16.0.0/25.Rate this question:
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