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[S1] Instant Messaging is a text-based application, thus by definition it can not be implemented by SIP, which was designed to support multimedia sessions  -  False True

[S2] There is no real expectation from SIP to support phone calls to/from circuit switched phones, as SIP was designed to replace the circuit switched telephony altogether  -  False True

[S3] QoS is a big issue for RTP. However it is not a big issue for SIP itself, since SIP has built-in QoS support  - FalseTrue

[S4] Not only SIP call setup might use IP multicast techniques, but the RTP session that follows might be multicast as well  -False True

[S5] SDP is a protocol, which is used to route SIP messages - False True

[S6] SIP proxies must be able to play (also) the role of IP routers, so they can forward the SIP messages to one another  - False True

[S7] SIP responses do not go via SIP redirect servers  -  False True

[S8] SIP end-points may return answer response (200 OK) right away, skipping the 180 ringing response and other possible 1xx responses altogether  - False True

[S9] If the SIP phone of the calling party knows the IP address of the SIP phone of the called party it may send it directly SIP invitations without going through a proxy (unless the Service provider's policy forbids that)  - False True

[S10] It is better to SIP red wine with white meat rather than with red meat  - False True