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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.
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CCNA Mcqs Test Practice Online

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1. 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

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

Floods the LSP to neighbors

Computes the best path to the destination network

Runs the Bellman-Ford algorithm

Calculates the SPF algorithm

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

ARP

UDP

TCP

4. Which routers will router D receive hello packets?

C only

B and C

A and E

A, B, C, and E

5. How many bytes is an Ethernet address?

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

TCP

UDP

ARP

7. 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

Forward the packet via the route to 10.16.1.64

Drop the packet

Use the default route

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

Updates that include complete routing tables

Updates triggered by network changes

Updates sent at regular intervals

Updates sent only to directly connected neighbors

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

128-191

128-190

1-126

129-192

1-127

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

192-223

203-234

129-192

1-127

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

ARP

BootP

RARP

ICMP

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

Routers flood the network with LSAs to discover routing loops

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

Routers use hold-down timers to prevent routing loops

Each router builds a complete and synchronized view of the network

13. 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

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

Queries BOS to see if it has a better route

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

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

LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors

All routers in the area have link state databases

Each router in the area floods LSPs to all neighbors

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

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

RARP

ARP

TCP

ICMP

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

DUAL algorithm is run to find best path to destination networks

LSPs are flooded to all neighbors to converge the network

Successors are placed into the routing table

SPF computes best path to each destination network

17. 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?

RARP

ICMP

TCP

ARPA

IPX

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

Neighbor table

Link-state database

Routing table

Adjacency table

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

Assigning lower process priorities to route calculations

Splitting routing topologies into smaller areas

Strict split horizon rules to reduce routing table entries

Using update timers to restrict routing updates

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

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.

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

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

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 172.16.10.30

172.16.10.17 through 172.16.10.31

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

ARP

UDP

TCP

23. 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

Hop count

A list of all the routing protocols in use

Uptime of the route

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

DUAL

Diffie-Hellman

Dijkstra

Bellman-Ford

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

Upon initial startup of router or routing protocol

Immediately after the Bellman-Ford algorithm has run

Immediately after the DUAL FSM has built the topology database

30 second timer expires

Whenever the network topology changes

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Maan AliLast Updated: October 10, 2025

Moeen Ashraf says:

August 18, 2020 at 12:44 am

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

CCNA Mcqs Test Online

CCNA Mcqs Test

CCNA Mcqs Test Practice Online

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