Which of the following is a non-routable (private) IP address? MCQ with Answer and Explanation

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Which of the following is a non-routable (private) IP address?

A. 203.0.113.100

B. 1.1.1.1

C. 8.8.8.8

D. 192.168.1.100

Answer: Option D

Solution (By JKSSB Mock Tests)

192.168.x.x is private and not routable on the public Internet.

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Question #1

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What is the primary benefit of upgrading a legacy hub-driven network to a modern network switch infrastructure?

A. It decreases the maximum physical cable length limits.

B. It eliminates collisions by creating dedicated collision domains for each connected port.

C. It removes the requirement for IP addressing rules.

D. It forces the network to run over analog modems.

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Correct Answer: Option B

Explanation:
Switches separate each port into its own collision domain. This eliminates collision risks, allowing for full-duplex data transfers.

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Question #2

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What is the purpose of a default gateway?

A. To assign IP addresses dynamically

B. To provide security by filtering packets

C. To translate domain names to IP addresses

D. To route traffic from a local network to other networks

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Correct Answer: Option D

Explanation:
A default gateway is a router that connects a local network to external networks, forwarding traffic when the destination is not local.

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Question #3

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Which of the following is a connectionless protocol at the transport layer?

A. TCP

B. IGMP

C. ICMP

D. UDP

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Correct Answer: Option D

Explanation:
UDP is connectionless; it sends datagrams without establishing a connection.

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