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User datagram protocol is called connectionless because _____________

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User datagram protocol is called connectionless because _____________

(a) all UDP packets are treated independently by transport layer

(b) it sends data as a stream of related packets

(c) it is received in the same order as sent order

(d) it sends data very quickly

I got this question in a job interview.

Asked question is from Transport Layer topic in chapter OSI Model of Computer Network

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Correct answer is (a) all UDP packets are treated independently by transport layer

Best explanation: UDP is an alternative for TCP and it is used for those purposes where speed matters most whereas loss of data is not a problem. UDP is connectionless whereas TCP is connection oriented.

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