Which of the following is a well-known port for FTP data transfer? MCQ with Answer and Explanation

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

A. 23

B. 20

C. 21

D. 22

Answer: Option B

Solution (By JKSSB Mock Tests)

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

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Question #1

Which device connects different networks and forwards data packets based on IP addresses?

A. Router

B. Switch

C. Hub

D. Modem

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Correct Answer: Option A

Explanation:
A router operates at the network layer and routes packets between different networks using IP addresses.

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Question #2

What happens if a terminator component is missing from either end of a traditional coaxial Bus Network line?

A. Signals reflect back along the cable when they hit the open end, causing signal corruption that drops the network.

B. The system re-routes all traffic to the loopback interface.

C. The data frame sizes double automatically.

D. The network transitions to a wireless ring structure.

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Correct Answer: Option A

Explanation:
Without a terminator to absorb signals at the physical endpoints of a bus network, signal bounce corrupts ongoing data traffic.

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Question #3

Which of the following is an example of a broadcast address?

A. 127.0.0.1

B. 192.168.1.1

C. 255.255.255.0

D. 192.168.1.255

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Correct Answer: Option D

Explanation:
In a /24 network, the broadcast address is the last address in the subnet, e.g., 192.168.1.255.

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