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User Datagram Protocol (UDP) (when to use? (a process that requires simple…
User Datagram Protocol (UDP)
when to use?
a process that requires simple request-response communication with little concern for flow and error control.
Process with internal flow and error control mechanism
Multicasting
Management processes – SNMP
Some route updating protocols – RIP, etc
UDP Operation
UDP uses concepts common to the transport layer.
Encapsulation and Decapsulation
Queuing
Multiplexing and Demultiplexing
UDP Checksum
UDP checksum calculation is different from the one for IP and ICMP. Checksum includes three sections: a pseudoheader, the UDP header, and the data coming from the application layer
User Datagram Format
UDP packets are called user datagrams and have a fixed-size header of 8 bytes.
Process-to-Process Communication
The unit of transfer in this layer is the UDP datagram, and the destination is an input port within a host.
the destination of a message is specified as the pair (host, port).
A UDP datagram is embedded in the data field of the Internet datagram, and contains its own header and data areas.
Modules
Control-Block Module
Input Module
Output Module
