In this chapter, we have looked at the protocols associated with
Sessions in the Mbone. These currently include Session Description
and Announcement/Advertisement, as well as Invitation protocols.
These can be seen in some senses as analogous with the telephony work
on Call Control protocols, although they have some other
functional elements, and interact with call routing, multicast address
assignment, and possibly even with signaling (e.g. RSVP) more directly
than one would typical admit to in ITU protocol designs.