# Important RFCs

## SIP

Reference: <http://tools.ietf.org/html/rfc3261>

Valuable updates and extensions:

* SIP Re-INVITE: <http://tools.ietf.org/html/rfc6141>

## ICE

Reference: <http://tools.ietf.org/html/rfc5245>

## ICE TCP

Reference: <http://tools.ietf.org/html/rfc6544>

## SDP

Reference: <http://tools.ietf.org/html/rfc4566>

How to use SDP: <http://tools.ietf.org/html/rfc3264>
Valuable updates and extensions:

* SDP and IPv6: <http://tools.ietf.org/html/rfc6157>
* SDP for SRTP: <http://tools.ietf.org/html/rfc4568>

## RTP

Reference: <http://tools.ietf.org/html/rfc3550>

Valuable updates and extensions:

* RTP and RTCP on the same port: <http://tools.ietf.org/html/rfc5761>

## SRTP

Reference: <http://tools.ietf.org/html/rfc3711>

Valuable updates and extensions:

* DTLS for SRTP: <https://tools.ietf.org/html/rfc5763> et <http://tools.ietf.org/html/rfc5764>
* AES-192 and AES-256: <https://tools.ietf.org/html/rfc6188>
* AES-GCM: <https://tools.ietf.org/html/rfc7714>