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Question

Packet in the IP layer are called .................

A
Datagram
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B
Message
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C
Fragments
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D
None of the above
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Solution

The correct option is A Datagram

Packet in the IP layer are called Datagram.

A datagram is the general word for a packet that is over a connectionless transport protocol. That is, the transmission, timing, and order are not guaranteed. For example, a packet sent over User Datagram Protocol(UDP) is a datagram. A datagram contains a header and a payload (with the data to be communicated).

A datagram is a basic transfer unit associated with a packet-switched network. Datagrams are typically structured in header and payload sections. Datagrams provide a connectionless communication service across a packet-switched network.

A packet is a block of data where the size may vary from 7 to 65542 bytes. We use the term packet when it comes to TCP , connection oriented. Whereas, datagram is a synonym for packets and used in UDP, connectionless. IP datagrams are also referred to as IP packets by many.

The format of data that can be recognized by IP is called an IP datagram. It consists of two components, namely, the header and data, which need to be transmitted. The fields in the datagram, except the data, have specific roles to perform in the transmission of data.


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