CCNA Mcqs Test Online

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Question 1

1. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?

Answer

Diffie-Hellman

Answer

Bellman-Ford

Question 2

2. What range of addresses can be used in the first octet of a Class C address?

Question 3

3. Which protocol works at the Internet layer and provides a connection service between hosts?

Question 4

4. Refer to the exhibit. What does JAX do with link-state packets from ORL?

Answer

Sends out the individual link-state packets out the interface connected to BOS

Answer

Queries BOS to see if it has a better route

Answer

Sends out its updated routing table to both ORL and BOS routers

Answer

Only adds it to the local routing table and performs no other actions

Question 5

5. How many bytes is an Ethernet address?

Question 6

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

Answer

Forward the packet via the route to 10.16.1.64

Answer

Drop the packet

Answer

Use the default route

Answer

Forward the packet via the route to 10.16.1.0

Question 7

7. What is the final step in the link state routing process?

Answer

Successors are placed into the routing table

Answer

LSPs are flooded to all neighbors to converge the network

Answer

DUAL algorithm is run to find best path to destination networks

Answer

SPF computes best path to each destination network

Question 8

8. What two events will cause a link state router to send LSPs to all neighbors?

Answer

Whenever the network topology changes

Answer

Upon initial startup of router or routing protocol

Answer

Immediately after the DUAL FSM has built the topology database

Answer

Immediately after the Bellman-Ford algorithm has run

Answer

30 second timer expires

Question 9

9. Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?

Answer

Uptime of the route

Answer

A list of all the routing protocols in use

Answer

Cost of the link

Question 10

10. Why is it difficult for routing loops to occur in networks that use link-state routing?

Answer

Each router builds a simple view of the network based on hop count

Answer

Each router builds a complete and synchronized view of the network

Answer

Routers use hold-down timers to prevent routing loops

Answer

Routers flood the network with LSAs to discover routing loops

Question 11

11. What range of addresses can be used in the first octet of a Class B network address?

Question 12

12. What speeds up convergence in a network using link-state routing?

Answer

Updates triggered by network changes

Answer

Updates sent at regular intervals

Answer

Updates sent only to directly connected neighbors

Answer

Updates that include complete routing tables

Question 13

13. What feature do modern link-state protocols provide to minimize processing and memory requirements?

Answer

Splitting routing topologies into smaller areas

Answer

Assigning lower process priorities to route calculations

Answer

Using update timers to restrict routing updates

Answer

Strict split horizon rules to reduce routing table entries

Question 14

14. If a router interface is congested, which protocol in the IP suite is used to tell neighbor routers?

Question 15

15. What is the valid host range the IP address 172.16.10.22 255.255.255.240 is a part of?

Answer

172.16.10.1 through 172.16.10.255

Answer

172.16.10.17 through 172.16.10.30

Answer

172.16.10.16 through 172.16.10.23

Answer

172.16.10.20 through 172.16.10.22

Answer

172.16.10.17 through 172.16.10.31

Question 16

16. If a host broadcasts a frame that includes a source and destination hardware address, and its purpose is to assign IP addresses to itself, which protocol at the Network layer does the host use?

Question 17

17. What two statements correctly describe the link state routing process?

Answer

LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors

Answer

All routers in the area have link state databases

Answer

Each router in the area floods LSPs to all neighbors

Answer

Routing loops are prevented by running the Diffusing Update Algorithm (DUAL)

Question 18

18. What protocol is used to find the hardware address of a local device?

Question 19

19. Which protocol works at the Transport layer and provides virtual circuits between hosts?

Question 20

20. When are link-state packets sent to neighbors?

Answer

Every 30 seconds

Answer

After the holddown time expires

Answer

When a link goes up or down

Answer

Every 180 seconds

Question 21

21. What are two advantages of using a link-state routing protocol instead of a distance vector routing protocol?

Answer

The topology database eliminates the need for a routing table.

Answer

Link-state protocols require less router processor power than distance vector protocols

Answer

Each router independently determines the route to each network.

Answer

After the inital LSP flooding, they generally require less bandwidth to communicate changes in a topology

Question 22

22. Which routers will router D receive hello packets?

Answer

A, B, C, and E

Question 23

23. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?

Answer

Adjacency table

Answer

Link-state database

Answer

Routing table

Answer

Neighbor table

Question 24

24. Which protocol working at the Transport layer provides a connectionless service between hosts?

Question 25

25. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?

Answer

Computes the best path to the destination network

Answer

Calculates the SPF algorithm

Answer

Runs the Bellman-Ford algorithm

Answer

Floods the LSP to neighbors

Question 26

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Total Questions:	25
Time Allowed:	10 Minutes
Total Marks:	25
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Computer Test Competitive exam Forces test Fpsc Entry test Recruitment test

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