CCNA Mcqs Test Online

Maan AliLast Updated: October 10, 2025

CCNA Mcqs Test

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

CCNA Mcqs Test Practice Online

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

Runs the Bellman-Ford algorithm

Floods the LSP to neighbors

Calculates the SPF algorithm

Computes the best path to the destination network

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

Routing table

Adjacency table

Neighbor table

Link-state database

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

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

Each router in the area floods LSPs to all neighbors

LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors

All routers in the area have link state databases

4. 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?

ICMP

ARPA

IPX

RARP

TCP

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

UDP

ARP

TCP

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

Diffie-Hellman

Bellman-Ford

Dijkstra

DUAL

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

Routers use hold-down timers to prevent routing loops

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

Routers flood the network with LSAs to discover routing loops

Each router builds a complete and synchronized view of the network

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

SPF computes best path to each destination network

DUAL algorithm is run to find best path to destination networks

Successors are placed into the routing table

LSPs are flooded to all neighbors to converge the network

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

Using update timers to restrict routing updates

Assigning lower process priorities to route calculations

Splitting routing topologies into smaller areas

Strict split horizon rules to reduce routing table entries

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

Every 30 seconds

Every 180 seconds

When a link goes up or down

After the holddown time expires

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

Cost of the link

A list of all the routing protocols in use

Uptime of the route

Hop count

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

1-126

129-192

128-190

128-191

1-127

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

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

The topology database eliminates the need for a routing table.

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

Each router independently determines the route to each network.

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

Forward the packet via the route to 10.16.1.0

Drop the packet

Use the default route

Forward the packet via the route to 10.16.1.64

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

ARP

UDP

TCP

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

172.16.10.17 through 172.16.10.30

172.16.10.16 through 172.16.10.23

172.16.10.1 through 172.16.10.255

172.16.10.20 through 172.16.10.22

172.16.10.17 through 172.16.10.31

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

TCP

ARP

RARP

ICMP

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

192-223

129-192

203-234

1-127

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

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

Queries BOS to see if it has a better route

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

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

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

TCP

ARP

UDP

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

Immediately after the Bellman-Ford algorithm has run

30 second timer expires

Immediately after the DUAL FSM has built the topology database

Whenever the network topology changes

Upon initial startup of router or routing protocol

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

Updates sent only to directly connected neighbors

Updates sent at regular intervals

Updates triggered by network changes

Updates that include complete routing tables

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

BootP

ARP

ICMP

RARP

24. Which routers will router D receive hello packets?

C only

A, B, C, and E

B and C

A and E

25. How many bytes is an Ethernet address?

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Maan AliLast Updated: October 10, 2025

Internet Control Message Protocol (ICMP) is used to send redirects back to an originating router.
. If a router interface is congested, which protocol in the IP suite is used to tell neighbor routers? ICMP is correct answer

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