Datagram Packets in the IPv4 layer are called datagrams. A datagram is a variable-length packet consisting of two parts: header and data. The IPv4 datagram format is below. Version (VER) :  4-bit field defines the version of the IPv4 protocol.  Header length (HLEN) :  This 4-bit field defines the total length of the datagram header… Continue reading Datagram

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