PARC Universal Packet


PARC Universal Packet (PUP) was one of the two earliest internetwork Protocol Suites and was created by researchers at Xerox Corporation PARC in the mid-1970s.

Technically, the name "PUP" only refers to the internetwork-level protocol, but it is also applied to the whole Protocol Suite which provided routing and packet delivery, as well as higher level functions such as a reliable byte stream, along with numerous applications.

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