Which protocol is used for network address translation? MCQ with Answer and Explanation

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Which protocol is used for network address translation?

A. NAT

B. DHCP

C. DNS

D. ARP

Answer: Option A

Solution (By JKSSB Mock Tests)

NAT translates private addresses to public ones, allowing multiple devices to share a single public IP.

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Question #1

Which of the following is a well-known port for FTP data transfer?

A. 21

B. 23

C. 22

D. 20

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Correct Answer: Option D

Explanation:
FTP uses port 20 for data transfer and port 21 for control.

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Question #2

What does the term packet refer to in networking?

A. A unit of data at the application layer

B. A unit of data at the physical layer

C. A unit of data at the data link layer

D. A unit of data at the network layer

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Correct Answer: Option D

Explanation:
A packet is a formatted unit of data at the network layer (layer 3).

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Question #3

Which of the following is an IP address reserved exclusively for use within private internal networks?

A. 8.8.4.4

B. 200.200.200.200

C. 172.32.1.1

D. 192.168.1.50

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Correct Answer: Option D

Explanation:
The 192.168.0.0 to 192.168.255.255 range is defined by RFC 1918 as a private Class C IP block reserved for internal networks.

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