Informative Quiz On CCNA Chapter #2
With a CCNA certificate you will be able to have unlimited careers in the digital industry. With about ten hours a week of study you are able to pass the exam with a lot of ease. The candid test on CCNA Chapter 11 below is designed to jog your memory on what we learnt.
- 1.
What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).
- A.
A serial port of the router
- B.
A modem
- C.
A switch
- D.
The ethernet port of a router
- E.
A CSU/DSU device
Correct Answer(s)
B. A modem
E. A CSU/DSU deviceExplanation
A modem is responsible for converting the data from the WAN service provider into a form acceptable by the router. A modem is used to modulate and demodulate the signals, allowing the router to communicate with the WAN service provider.
A CSU/DSU device is also responsible for converting the data from the WAN service provider into a form acceptable by the router. A CSU (Channel Service Unit) handles the physical connection to the WAN service provider, while a DSU (Data Service Unit) converts the data into a format that the router can understand.
Both the modem and the CSU/DSU device play crucial roles in ensuring that the data from the WAN service provider can be properly transmitted and received by the router.Rate this question:
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- 2.
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?
- A.
Drops the packet because the destination host is not listed in the routing table
- B.
Looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame
- C.
Performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet
- D.
Encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface
Correct Answer
D. Encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interfaceExplanation
After finding the recently configured static route in the routing table, Router1 will encapsulate the packet into a frame for the WAN link and forward the packet out the S0/1/0 interface. This means that the router will package the packet into a format suitable for transmission over the Wide Area Network (WAN) link and send it out through the specified interface.Rate this question:
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- 3.
Which piece of information is available from examining the output of the command show ip interface brief?
- A.
Interface speed and duplex
- B.
Interface MTU
- C.
Errors
- D.
Interface MAC address
- E.
Interface IP addres
Correct Answer
E. Interface IP addresExplanation
By examining the output of the command "show ip interface brief," one can determine the interface IP address. This command provides a summary of all the interfaces on a device along with their IP addresses. It allows network administrators to quickly identify the IP addresses assigned to each interface, which is crucial for troubleshooting and network management purposes.Rate this question:
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- 4.
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?
- A.
Serial0/1 is shutdown.
- B.
There is no cable connecting the routers.
- C.
The remote router is using serial 0/0.
- D.
No clock rate has been set.
Correct Answer
D. No clock rate has been set.Explanation
The most likely cause for the line protocol being down is that no clock rate has been set. The line protocol being down indicates that there is a problem with the communication between the local and remote routers. In this case, the absence of a clock rate setting on the serial interface can prevent the line protocol from coming up. The clock rate is necessary for synchronization between the two routers, so without it, the line protocol remains down.Rate this question:
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- 5.
Which address can be used to summarize networks 172.16.0.0/24 thru 172.16.7.0/24
- A.
172.16.0.0/21
- B.
172.16.1.0/22
- C.
172.16.0.0 255.255.255.248
- D.
172.16.0.0 255.255.252.0
Correct Answer
A. 172.16.0.0/21Explanation
The correct answer is 172.16.0.0/21. This is because the given range of networks, 172.16.0.0/24 to 172.16.7.0/24, can be summarized by the network 172.16.0.0/21. This is because the first 21 bits of the IP address remain constant for all the networks in the range, allowing them to be summarized under a single network address.Rate this question:
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- 6.
Refer to the exhibit. Which static route should be configured on Router1 so that host A will be able to reach host B on the 172.16.0.0 network?
- A.
Ip route 192.168.0.0 172.16.0.0 255.255.0.0
- B.
Ip route 172.16.0.0 255.255.0.0 192.168.0.1
- C.
Ip route 172.16.0.0 255.255.0.0 S0/0/1
- D.
Ip route 172.16.0.0 255.255.0.0 S0/0/0
Correct Answer
D. Ip route 172.16.0.0 255.255.0.0 S0/0/0Explanation
The correct answer is "ip route 172.16.0.0 255.255.0.0 S0/0/0". This static route should be configured on Router1 so that host A will be able to reach host B on the 172.16.0.0 network. This is because the destination network is 172.16.0.0 with a subnet mask of 255.255.0.0, and the next hop for this route is the serial interface S0/0/0.Rate this question:
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- 7.
Which of the following is true regarding CDP and the graphic shown?
- A.
CDP running on Router D will gather information about routers A, B, C, and E.
- B.
By default, Router A will receive CDP advertisements from routers B and C.
- C.
If routers D and E are running different routing protocols, they will not exchange CDP information.
- D.
Router E can use CDP to identify the IOS running on Router B.
Correct Answer
B. By default, Router A will receive CDP advertisements from routers B and C. -
- 8.
Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link?
- A.
The rate would be negotiated by both routers.
- B.
A rate would not be selected due to the DCE/DTE connection mismatch.
- C.
The rate configured on the DTE determines the clock rate.
- D.
The rate configured on the DCE determines the clock rate.
Correct Answer
D. The rate configured on the DCE determines the clock rate.Explanation
In this scenario, the exhibit shows the output of the "show interfaces serial" command. The output displays the role of each router, with one router acting as the DCE (Data Circuit-terminating Equipment) and the other as the DTE (Data Terminal Equipment). The clock rate is determined by the DCE, which means that the rate configured on the DCE router will determine the clock rate for this link.Rate this question:
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- 9.
A static route that points to the next hop IP will have what administrative distance and metric in the routing table?
- A.
Administrative distance of 0 and metric of 0
- B.
Administrative distance of 0 and metric of 1
- C.
Administrative distance of 1 and metric of 0
- D.
Administrative distance of 1 and metric of 1
Correct Answer
C. Administrative distance of 1 and metric of 0Explanation
A static route is a manually configured route that does not change unless modified by an administrator. The administrative distance determines the trustworthiness of a routing protocol, with lower values indicating higher trust. In this case, the administrative distance of 1 suggests that the static route is less trustworthy than directly connected routes. The metric, on the other hand, is used to determine the best path among multiple routes to the same destination. A metric of 0 indicates that the static route is the most preferred path in the routing table. Therefore, the correct answer is administrative distance of 1 and metric of 0.Rate this question:
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- 10.
What happens to a static route entry in a routing table when the outgoing interface is not available
- A.
The route is removed from the table.
- B.
The router polls neighbors for a replacement route.
- C.
The route remains in the table because it was defined as static.
- D.
The router redirects the static route to compensate for the loss of the next hop device.
Correct Answer
A. The route is removed from the table.Explanation
When the outgoing interface for a static route is not available, the route is no longer valid and cannot be used for forwarding packets. Therefore, the router removes the route from the routing table to prevent any further attempts to use it.Rate this question:
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- 11.
Why is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet network?
- A.
Adding the next-hop address eliminates the need for the router to do any lookups in the routing table before forwarding a packet.
- B.
In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address
- C.
Using a next-hop address in a static route provides a route with a lower metric.
- D.
In multi-access networks, using a next-hop address in a static route makes that route a candidate default route.
Correct Answer
B. In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop addressExplanation
In a multi-access network, such as an Ethernet network, the router needs to know the next-hop MAC address in order to forward packets correctly. By adding a next-hop IP address when creating a static route, the router can use Address Resolution Protocol (ARP) to determine the corresponding MAC address. This eliminates the need for the router to perform additional lookups in the routing table, improving efficiency and reducing latency. Therefore, it is advisable to enter a next-hop IP address when creating a static route in an Ethernet network.Rate this question:
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- 12.
Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)
- A.
Load
- B.
Platform
- C.
Reliability
- D.
Holdtime
- E.
Local interface
Correct Answer(s)
B. Platform
D. Holdtime
E. Local interfaceExplanation
The "show cdp neighbors" command displays information about neighboring devices connected to the router. The "platform" option displays the platform or model of the neighboring device. The "holdtime" option shows the remaining time before the neighbor relationship will expire. The "local interface" option displays the interface on the local router that is connected to the neighboring device.Rate this question:
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