What is the function of a router's ARP table? MCQ with Answer and Explanation

Question
What is the function of a router's ARP table?
A. Stores DHCP leases
B. Stores routing information
C. Stores mappings between IP addresses and MAC addresses
D. Stores DNS records
Answer: Option C
Solution (By JKSSB Mock Tests)
The ARP table on a router caches IP-to-MAC mappings for local devices.
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Practice More Computer Networking Questions

Question #1
In a network configured with a hierarchical Tree Topology, what happens if the primary central root device fails completely?
A. The entire connected network structure collapses and communications stop.
B. All data lines transition to half-duplex speed profiles.
C. The network switches to full-mesh configuration automatically.
D. Isolated sub-branches can still communicate locally, but communication across separate branches is broken.
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Correct Answer: Option D

Explanation:
In a tree topology, a root failure isolates separate sub-star branches from each other, though individual branches may still function
This question belongs to: Computer Computer Networking
Question #2
Which type of network connection allows communication to flow in both directions at the same time (e.g., a standard cellular phone conversation)?
A. Full-Duplex
B. Asynchronous
C. Half-Duplex
D. Simplex
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Correct Answer: Option A

Explanation:
Full-duplex links support simultaneous bidirectional transmission, allowing devices to send and receive data at the same time.
This question belongs to: Computer Computer Networking
Question #3
What is the purpose of a firewall's ACL (Access Control List)?
A. To resolve domain names
B. To forward packets
C. To assign IP addresses
D. To define rules for permitting or denying traffic
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Correct Answer: Option D

Explanation:
ACLs are used to filter network traffic based on IP, port, or other criteria.
This question belongs to: Computer Computer Networking
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