RFC 3135 (rfc3135) - Page 1 of 45
Performance Enhancing Proxies Intended to Mitigate Link-Related Degradations
Alternative Format: Original Text Document
Network Working Group J. Border
Request for Comments: 3135 Hughes Network Systems
Category: Informational M. Kojo
University of Helsinki
J. Griner
NASA Glenn Research Center
G. Montenegro
Sun Microsystems, Inc.
Z. Shelby
University of Oulu
June 2001
Performance Enhancing Proxies Intended to Mitigate Link-Related
Degradations
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract
This document is a survey of Performance Enhancing Proxies (PEPs)
often employed to improve degraded TCP performance caused by
characteristics of specific link environments, for example, in
satellite, wireless WAN, and wireless LAN environments. Different
types of Performance Enhancing Proxies are described as well as the
mechanisms used to improve performance. Emphasis is put on proxies
operating with TCP. In addition, motivations for their development
and use are described along with some of the consequences of using
them, especially in the context of the Internet.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Types of Performance Enhancing Proxies . . . . . . . . . . . . 4
2.1 Layering . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1.1 Transport Layer PEPs . . . . . . . . . . . . . . . . . . . . 5
2.1.2 Application Layer PEPs . . . . . . . . . . . . . . . . . . . 5
2.2 Distribution . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Implementation Symmetry . . . . . . . . . . . . . . . . . . . 6
2.4 Split Connections . . . . . . . . . . . . . . . . . . . . . . 7
Border, et al. Informational