1. In which situation, a unicast session or a multicast session, can feedback received from an RTCP packet about the session be handled more easily by the sender?
2. Can the combination of RTP/RTCP and SIP operate in a wireless environment? Explain.
3. Do some research and find out if SIP can provide the following services provided by modern telephone sets.
a. caller-ID
b. call-waiting
c. multiparty calling