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Transport Layer (Part 2)

Computer Networks

Tutun JuhanaTelecommunication EngineeringSchool of Electrical Engineering & InformaticsInstitut Teknologi Bandung

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UDPUSER DATAGRAM PROTOCOL

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UDP is a connectionless, unreliabletransport protocol

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UDP SERVICES

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Process-to-Process Communication

UDP provides process-to-process communication usingsockets

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Connectionless Services

One of the ramifications of being connectionless isthat the process that uses UDP cannot send a

stream of data to UDP and expect UDP to chop

them into different related user datagrams. Insteadeach request must be small enough to fit into one

user datagram. Only those processes sendingshort messages, messages less than 65,507 bytes

(65,535 minus 8 bytes for the UDP header andminus 20 bytes for the IP header), can use UDP.

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Queuing

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Multiplexing and Demultiplexing

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