rfc3150.txt

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   community.  Indeed, general XML content encodings have been proposed
   [Millau], although they are not yet widely adopted.

   We note that TCP options which change from segment to segment
   effectively disable header compression schemes deployed today,
   because there's no way to indicate that some fields in the header are
   unchanged from the previous segment, while other fields are not.  The
   Robust Header Compression working group is developing such schemes
   for TCP options such as timestamps and selective acknowledgements.
   Hopefully, documents subsequent to [RFC3095] will define such
   specifications.

   Another effort worth following is that of 'Delta Encoding'.  Here,
   clients that request a slightly modified version of some previously
   cached resource would receive a succinct description of the
   differences, rather than the entire resource [HTTP-DELTA].

5.0 Security Considerations

   All recommendations included in this document are stable standards-
   track RFCs (at Proposed Standard status, as of this writing) or
   otherwise do not suggest any changes to any protocol.  With the
   exception of Van Jacobson compression [RFC1144] and [RFC2507,
   RFC2508, RFC2509], all other mechanisms are applicable to TCP
   connections protected by end-to-end IPSec.  This includes ROHC
   [RFC3095], albeit partially, because even though it can compress the
   outermost ESP header to some extent, encryption still renders any
   payload data uncompressible (including any subsequent protocol
   headers).






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6.0 IANA Considerations

   This document is a pointer to other, existing IETF standards.  There
   are no new IANA considerations.

7.0 Acknowledgements

   This recommendation has grown out of "Long Thin Networks" [RFC2757],
   which in turn benefited from work done in the IETF TCPSAT working
   group.

8.0 References

   [AlPa99]     Mark Allman and Vern Paxson, "On Estimating End-to-End
                Network Path Properties", in ACM SIGCOMM 99 Proceedings,
                1999.

   [HTTP-DELTA] J. Mogul, et al., "Delta encoding in HTTP", Work in
                Progress.

   [HTTP-NG]    Mike Spreitzer, Bill Janssen, "HTTP 'Next Generation'",
                9th International WWW Conference, May, 2000.  Also
                available as:  http://www.www9.org/w9cdrom/60/60.html

   [Millau]     Marc Girardot, Neel Sundaresan, "Millau: an encoding
                format for efficient representation and exchange of XML
                over the Web", 9th International WWW Conference, May,
                2000.  Also available as:
                http://www.www9.org/w9cdrom/154/154.html

   [PAX97]      Paxson, V., "End-to-End Internet Packet Dynamics", 1997,
                in SIGCOMM 97 Proceedings, available as:
                http://www.acm.org/sigcomm/ccr/archive/ccr-toc/ccr-toc-
                97.html

   [RED93]      Floyd, S., and Jacobson, V., Random Early Detection
                gateways for Congestion Avoidance, IEEE/ACM Transactions
                on Networking, V.1 N.4, August 1993, pp. 397-413.  Also
                available from http://ftp.ee.lbl.gov/floyd/red.html.

   [RFC1144]    Jacobson, V., "Compressing TCP/IP Headers for Low-Speed
                Serial Links", RFC 1144, February 1990.









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   [RFC1323]    Jacobson, V., Braden, R. and D. Borman, "TCP Extensions
                for High Performance", RFC 1323, May 1992.

   [RFC2246]    Dierks, T. and C. Allen, "The TLS Protocol: Version
                1.0", RFC 2246, January 1999.

   [RFC2309]    Braden, R., Clark, D., Crowcroft, J., Davie, B.,
                Deering, S., Estrin, D., Floyd, S., Jacobson, V.,
                Minshall, G., Partridge, C., Peterson, L., Ramakrishnan,
                K., Shenker, S., Wroclawski, J. and L. Zhang,
                "Recommendations on Queue Management and Congestion
                Avoidance in the Internet", RFC 2309, April 1998.

   [RFC2393]    Shacham, A., Monsour, R., Pereira, R. and M. Thomas, "IP
                Payload Compression Protocol (IPComp)", RFC 2393,
                December 1998.

   [RFC2401]    Kent, S. and R. Atkinson, "Security Architecture for the
                Internet Protocol", RFC 2401, November 1998.

   [RFC2416]    Shepard, T. and C. Partridge, "When TCP Starts Up With
                Four Packets Into Only Three Buffers", RFC 2416,
                September 1998.

   [RFC2507]    Degermark, M., Nordgren, B. and S. Pink, "IP Header
                Compression", RFC 2507, February 1999.

   [RFC2508]    Casner, S. and V. Jacobson. "Compressing IP/UDP/RTP
                Headers for Low-Speed Serial Links", RFC 2508, February
                1999.

   [RFC2509]    Engan, M., Casner, S. and C. Bormann, "IP Header
                Compression over PPP", RFC 2509, February 1999.

   [RFC2581]    Allman, M., Paxson, V. and W. Stevens, "TCP Congestion
                Control", RFC 2581, April 1999.

   [RFC2616]    Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,
                Masinter, L., Leach, P. and T. Berners-Lee, "Hypertext
                Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.

   [RFC2757]    Montenegro, G., Dawkins, S., Kojo, M., Magret, V., and
                N. Vaidya, "Long Thin Networks", RFC 2757, January 2000.

   [RFC3042]    Allman, M., Balakrishnan, H. and S. Floyd, "Enhancing
                TCP's Loss Recovery Using Limited Transmit", RFC 3042,
                January 2001.




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   [RFC3095]    Bormann, C., Burmeister, C., Degermark, M., Fukushima,
                H., Hannu, H., Jonsson, L-E., Hakenberg, R., Koren, T.,
                Le, K., Liu, Z., Martensson, A., Miyazaki, A., Svanbro,
                K., Wiebke, T., Yoshimura, T. and H. Zheng, "RObust
                Header Compression (ROHC): Framework and four Profiles:
                RTP, UDP ESP and uncompressed", RFC 3095, July 2001.

   [SMM98]      Jeffrey Semke, Matthew Mathis, and Jamshid Mahdavi,
                "Automatic TCP Buffer Tuning", in ACM SIGCOMM 98
                Proceedings 1998. Available from
                http://www.acm.org/sigcomm/sigcomm98/tp/abs_26.html.

   [SSL]        Alan O. Freier, Philip Karlton, Paul C. Kocher, The SSL
                Protocol: Version 3.0, March 1996.  (Expired Internet-
                Draft, available from
                http://home.netscape.com/eng/ssl3/ssl-toc.html)

   [TCPB98]     Hari Balakrishnan, Venkata N. Padmanabhan, Srinivasan
                Seshan, Mark Stemm, Randy H. Katz, "TCP Behavior of a
                Busy Internet Server: Analysis and Improvements", IEEE
                Infocom, March 1998. Available from:
                http://www.cs.berkeley.edu/~hari/papers/infocom98.ps.gz

   [TCPF98]     Dong Lin and H.T. Kung, "TCP Fast Recovery Strategies:
                Analysis and Improvements", IEEE Infocom, March 1998.
                Available from:
                http://www.eecs.harvard.edu/networking/papers/ infocom-
                tcp-final-198.pdf

   [WSP]        Wireless Application Protocol Forum, "WAP Wireless
                Session Protocol Specification", approved 4 May, 2000,
                available from
                http://www1.wapforum.org/tech/documents/WAP-203-WSP-
                20000504-a.pdf.  (informative reference).

















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Authors' Addresses

   Questions about this document may be directed to:

   Spencer Dawkins
   Fujitsu Network Communications
   2801 Telecom Parkway
   Richardson, Texas 75082

   Phone:  [phone]
   EMail: [e-mail]


   Gabriel Montenegro
   Sun Microsystems Laboratories, Europe
   29, chemin du Vieux Chene
   38240 Meylan, FRANCE

   Phone:  [phone]
   EMail: [e-mail]


   Markku Kojo
   Department of Computer Science
   University of Helsinki
   P.O. Box 26 (Teollisuuskatu 23)
   FIN-00014 HELSINKI
   Finland

   Phone: [phone]
   Fax:   [phone]
   EMail: [e-mail]


   Vincent Magret
   Alcatel Internetworking, Inc.
   26801 W. Agoura road
   Calabasas, CA, 91301

   Phone: [phone]
   EMail: [e-mail]










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Full Copyright Statement

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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.



















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