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Question

UDP and TCP are both .............. layer protocol.

A
Physical
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B
Network
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C
Data link
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D
Transport
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Solution

The correct option is D Transport

UDP and TCP are both Transport layer protocol.

The transport layer: TCP and UDP. ... The user datagram protocol (UDP), is an unreliable transport protocol with no sessions or flow control and optional error checking. UDP just sends packets as soon as requested and forgets about them.

The User Datagram Protocol (UDP) is simplest Transport Layer communication protocol available of the TCP/IP protocol suite. It involves minimum amount of communication mechanism. UDP is said to be an unreliable transport protocol but it uses IP services which provides best effort delivery mechanism.

List the methods or mechanism provided by Transport layer for reliable delivery of data. Like the data link layer transport layer is responsible for flow control. Flow control is performed end to end rather than across a single link. Transport layer flow control uses a sliding window protocol.

There are two types of Internet Protocol (IP) traffic. They are TCP or Transmission Control Protocol and UDP or User Datagram Protocol. TCP is connection oriented – once a connection is established, data can be sent bidirectional. UDP is a simpler, connectionless Internet protocol.


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