Which protocol works automatically to resolve local IP addresses to physical hardware addresses on an Ethernet network segment? MCQ with Answer and Explanation

Question

Which protocol works automatically to resolve local IP addresses to physical hardware addresses on an Ethernet network segment?

A. ARP (Address Resolution Protocol)

B. DNS

C. NAT

D. DHCP

Answer: Option A

Solution (By JKSSB Mock Tests)

ARP converts logical IP targets into corresponding physical MAC addresses within a local data link layer segment.

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Question #1

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Which protocol is responsible for mapping a known logical IP address to its corresponding physical hardware MAC address on a local area network?

A. DHCP

B. ARP (Address Resolution Protocol)

C. ICMP

D. DNS

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Correct Answer: Option B

Explanation:
ARP operates within local subnets to discover the physical MAC address of a device when its logical IP address is already known.

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Question #2

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What is the range of dynamic ports in TCP/UDP?

A. 1024-49151

B. 1-65535

C. 0-1023

D. 49152-65535

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Correct Answer: Option D

Explanation:
Dynamic or private ports are from 49152 to 65535, used for temporary sessions.

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Question #3

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How many bits are used to define a single unique physical MAC address etched onto a network interface card (NIC)?

A. 128 bits

B. 64 bits

C. 32 bits

D. 48 bits

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Correct Answer: Option D

Explanation:
A MAC (Media Access Control) address is a 48-bit (6-byte) permanent hardware identifier represented in hexadecimal notation.

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