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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. 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

2. How many bytes is an Ethernet address?

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

Drop the packet

Forward the packet via the route to 10.16.1.0

Forward the packet via the route to 10.16.1.64

Use the default route

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

Bellman-Ford

Dijkstra

Diffie-Hellman

DUAL

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

128-190

1-126

1-127

128-191

129-192

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

ICMP

RARP

BootP

ARP

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

192-223

129-192

203-234

1-127

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

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

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

Queries BOS to see if it has a better route

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

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

30 second timer expires

Upon initial startup of router or routing protocol

Immediately after the Bellman-Ford algorithm has run

Whenever the network topology changes

Immediately after the DUAL FSM has built the topology database

10. Which routers will router D receive hello packets?

A, B, C, and E

B and C

C only

A and E

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

ARP

ICMP

TCP

RARP

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

UDP

ARP

TCP

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

Each router in the area floods LSPs to all neighbors

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

All routers in the area have link state databases

LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors

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

Calculates the SPF algorithm

Floods the LSP to neighbors

Computes the best path to the destination network

Runs the Bellman-Ford algorithm

15. 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

LSPs are flooded to all neighbors to converge the network

Successors are placed into the routing table

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

Every 180 seconds

After the holddown time expires

Every 30 seconds

When a link goes up or down

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

TCP

UDP

ARP

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

172.16.10.1 through 172.16.10.255

172.16.10.17 through 172.16.10.31

172.16.10.20 through 172.16.10.22

172.16.10.16 through 172.16.10.23

172.16.10.17 through 172.16.10.30

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

Splitting routing topologies into smaller areas

Assigning lower process priorities to route calculations

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?

Each router independently determines the route to each network.

The topology database eliminates the need for a routing table.

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

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

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

Link-state database

Routing table

Neighbor table

Adjacency table

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

Updates sent at regular intervals

Updates that include complete routing tables

Updates triggered by network changes

Updates sent only to directly connected neighbors

23. 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

IPX

TCP

RARP

ARPA

24. 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

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

ARP

TCP

UDP

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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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