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MTU (Maximum Transmission Unit)
Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
An MTU is a parameter that specifies how much data a frame for a particular network can carry. This parameter becomes an issue when networks are interconnected and the networks have different MTU sizes. When a datagram arrives at a router that must be forwarded onto a network with a smaller MTU size, the router fragments the packet into pieces that will fit into the frames of the next-hop network.
Refer to "Fragmentation and Reassembly" for more information about this topic.
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.