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11Chapter
SIP Quality-of-Service
Performance
e Session Initiation Protocol (SIP) is a new application level protocol that was
developed to support the exchange of information that is required for the estab-
lishment of media sessions in IP networks. It supports mobility at the application
layer through its capability to establish and tear down sessions. Its main function
is to create, establish, and tear down media sessions between one or more SIP end-
points. ese end-points have valid SIP addresses and form part of the information
that is exchanged during SIP signaling. e end-points may reside in either the
IPv4 or IPv6 domain, and applic ...