What are the largest UDP messages, Computer Engineering

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What are the largest UDP messages that can fit into single Ethernet frame?

UDP utilizes IP for delivery. As ICMP UDP packet is encapsulated in IP datagram. Therefore entire UDP message should fit into the IP datagram, and which datagram should fit in single Ethernet frame. Maximum size of an Ethernet frame is 1500 bytes. Therefore largest UDP message which can fit in single Ethernet frame must not be larger than 1500 bytes.

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The encapsulation of a UDP message in an IP datagram.

The whole UDP message, with the header and data areas resides into the data area of IP datagram.


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