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Understanding Network Connections
October 1, 1995
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BibTex
Authors
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Butler Lampson
Publication Type
Inproceedings
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Abstract
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Related Info
Abstract
Presentation: There are lots of protocols for establishing connections (or equivalently, doing atmost-once message delivery) across a network that can delay, reorder, duplicate and lose
packets. Most of the popular ones are based on three-way handshake, but some use clocks or
extra stable storage operations to reduce the number of messages required. It’s hard to
understand why the protocols work, and there are almost no correctness proofs; even careful
specifications are rare. I will give a specification for at-most-once message delivery, an informal
account of the main problems an implementation must solve and the common features that most
implementations share, and outlines of proofs for three implementations. The specifications and
proofs based on Lamport’s methods for using abstraction functions to understand concurrent
systems, and I will say something about how his methods can be applied to many other problems
of practical interest.
Related Info
Related Files
 connections.doc
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 Microsoft Research Lab - Redmond
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