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  ITU-T A.5 justification information for referenced document IETF RFC 4572 (2006) in draft H.235.10
1. Clear description of the referenced document:
Name: IETF RFC 4572 (2006)
Title: Connection-Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)
2. Status of approval:
Proposed Standard approved by the IETF IESG in July 2006.Obsoleted by RFC 8122.
3. Justification for the specific reference:
This Recommendation emulates the functionality and syntax defined in RFC 4572.
4. Current information, if any, about IPR issues:
Information on IPR issues regarding RFCs is available at: https://datatracker.ietf.org/ipr/search/. Specifically: https://datatracker.ietf.org/ipr/search/?option=rfc_search&rfc_search=4572
5. Other useful information describing the "Quality" of the document:
This RFC has been in existence since 2006. This text is a Standards Track. Updates RFC 4145. Obsoleted by RFC 8122. No errata.
6. The degree of stability or maturity of the document:
This is a standards-track document based that was widely implemented.
7. Relationship with other existing or emerging documents:
RFC 4572 reuses the TCP-specific RFC 4145 SDP element "a=setup:" and extends it semantically for the TLS protocol.
8. Any explicit references within that referenced document should also be listed:
Normative References /
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[1] National Institute of Standards and Technology, "Secure Hash Standard (SHS)", FIPS PUB 180-4, DOI 10.6028/NIST.FIPS.180-4, August 2015, http://nvlpubs.nist.gov/nistpubs/FIPS/ NIST.FIPS.180-4.pdf. /
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[2] International Organization for Standardization, "Information technology -- Open Systems Interconnection -- The Directory -- Part 8: Public-key and attribute certificate frameworks", ISO/IEC 9594-8:2014, March 2014, https://www.iso.org/standard/64854.html. /
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[3] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, http://www.rfc-editor.org/info/rfc2119. /
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[4] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model with Session Description Protocol (SDP)", RFC 3264, DOI 10.17487/RFC3264, June 2002, http://www.rfc-editor.org/info/rfc3264. /
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[5] Bassham, L., Polk, W., and R. Housley, "Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 3279, DOI 10.17487/RFC3279, April 2002, http://www.rfc-editor.org/info/rfc3279. /
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[6] Schaad, J., Kaliski, B., and R. Housley, "Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 4055, DOI 10.17487/RFC4055, June 2005, http://www.rfc-editor.org/info/rfc4055. /
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[7] Yon, D. and G. Camarillo, "TCP-Based Media Transport in the Session Description Protocol (SDP)", RFC 4145, DOI 10.17487/RFC4145, September 2005, http://www.rfc-editor.org/info/rfc4145. /
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[8] Handley, M., Jacobson, V., and C. Perkins, "SDP: Session Description Protocol", RFC 4566, DOI 10.17487/RFC4566, July 2006, http://www.rfc-editor.org/info/rfc4566. /
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[9] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, DOI 10.17487/RFC5234, January 2008, http://www.rfc-editor.org/info/rfc5234. /
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[10] Dierks, T. and E. Rescorla, "The Transport Layer Security (TLS) Protocol Version 1.2", RFC 5246, DOI 10.17487/RFC5246, August 2008, http://www.rfc-editor.org/info/rfc5246. /
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[11] Cooper, D., Santesson, S., Farrell, S., Boeyen, S., Housley, R., and W. Polk, "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 5280, DOI 10.17487/RFC5280, May 2008, http://www.rfc-editor.org/info/rfc5280. /
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[12] Freed, N., Klensin, J., and T. Hansen, "Media Type Specifications and Registration Procedures", BCP 13, RFC 6838, DOI 10.17487/RFC6838, January 2013, http://www.rfc-editor.org/info/rfc6838. /
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Informative References /
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[13] Rivest, R., "The MD5 Message-Digest Algorithm", RFC 1321, DOI 10.17487/RFC1321, April 1992, http://www.rfc-editor.org/info/rfc1321. /
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[14] Rescorla, E., "HTTP Over TLS", RFC 2818, DOI 10.17487/RFC2818, May 2000, http://www.rfc-editor.org/info/rfc2818. /
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[15] Handley, M., Perkins, C., and E. Whelan, "Session Announcement Protocol", RFC 2974, DOI 10.17487/RFC2974, October 2000, http://www.rfc-editor.org/info/rfc2974. /
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[16] Eastlake 3rd, D. and P. Jones, "US Secure Hash Algorithm 1 (SHA1)", RFC 3174, DOI 10.17487/RFC3174, September 2001, http://www.rfc-editor.org/info/rfc3174. /
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[17] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, DOI 10.17487/RFC3261, June 2002, http://www.rfc-editor.org/info/rfc3261. /
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[18] Ylonen, T. and C. Lonvick, Ed., "The Secure Shell (SSH) Protocol Architecture", RFC 4251, DOI 10.17487/RFC4251, January 2006, http://www.rfc-editor.org/info/rfc4251. /
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[19] Lazzaro, J., "Framing Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP) Packets over Connection-Oriented Transport", RFC 4571, DOI 10.17487/RFC4571, July 2006, http://www.rfc-editor.org/info/rfc4571. /
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[20] Lennox, J., "Connection-Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)", RFC 4572, DOI 10.17487/RFC4572, July 2006, http://www.rfc-editor.org/info/rfc4572. /
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[21] Taylor, T., "Reclassification of RFC 3525 to Historic", RFC 5125, DOI 10.17487/RFC5125, February 2008, http://www.rfc-editor.org/info/rfc5125. /
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[22] Ramsdell, B. and S. Turner, "Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification", RFC 5751, DOI 10.17487/RFC5751, January 2010, http://www.rfc-editor.org/info/rfc5751. /
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[23] Turner, S. and L. Chen, "MD2 to Historic Status", RFC 6149, DOI 10.17487/RFC6149, March 2011, http://www.rfc-editor.org/info/rfc6149. /
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[24] Shekh-Yusef, R., Ed., Ahrens, D., and S. Bremer, "HTTP Digest Access Authentication", RFC 7616, DOI 10.17487/RFC7616, September 2015, http://www.rfc-editor.org/info/rfc7616.
9. Qualification of ISOC/IETF:
9.1-9.6     Decisions of ITU Council to admit ISOC to participate in the work of the Sector (June 1995 and June 1996).
9.7     The Internet Engineering Steering Group (IESG) is responsible for ongoing maintenance of the RFCs when the need arises. Comments on RFCs and corresponding changes are accommodated through the existing standardization process.
9.8     Each revision of a given RFC has a different RFC number, so no confusion is possible. All RFCs always remain available on-line. An index of RFCs and their status may be found in the IETF archives at http://www.rfc-editor.org/rfc.html.
10. Other (for any supplementary information):
None
Note: This form is based on Recommendation ITU-T A.5