Which protocol is connectionless and does not guarantee delivery? MCQ with Answer and Explanation

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Which protocol is connectionless and does not guarantee delivery?

A. HTTP

B. TCP

C. UDP

D. FTP

Answer: Option C

Solution (By JKSSB Mock Tests)

UDP (User Datagram Protocol) is connectionless and provides no guarantees of delivery, order, or error checking.

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Question #1

Which of the following is a private IP address range?

A. 10.0.0.0 to 10.255.255.255

B. 192.168.0.0 to 192.168.255.255

C. 203.0.113.0 to 203.0.113.255

D. 172.15.0.0 to 172.31.255.255

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Correct Answer: Option A

Explanation:
10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are private IP ranges. 10.x.x.x is valid.

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Question #2

Which mechanism enables an internet router to modify packet headers, allowing thousands of private internal LAN hosts to navigate the web through a single public IP address?

A. Domain Name mapping

B. Address Resolution lookup

C. DHCP lease management

D. Network Address Translation (NAT)

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Correct Answer: Option D

Explanation:
NAT converts private internal IP addresses to a public IP address, conserving IPv4 space and adding an extra layer of internal security.

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Question #3

What is the size of an IPv4 address in bits?

A. 16

B. 64

C. 32

D. 128

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Correct Answer: Option C

Explanation:
IPv4 addresses are 32 bits long, typically expressed in dotted decimal.

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