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[S1] Ironically SIP is not the main protocol used by IMS  - False True

[S2] IMS is mostly not access network agnostic, due to the low layer protocols used by it  -  False True

[S3] Since IMS traffic is an application layer one, it seems to the GPRS core as any other data traffic, which travels over it  - False True

[S4] Without IMS it is possible that two GPRS users in the same room would exchange Instant Messages with  each other via an IM (Instant Messaging) server, which is located in a different country  - False True

[S5] IMS enables GPRS or/and UMTS phones (which run IMS client software) to make and receive phone calls. However, unfortunately IMS is a GPRS/UMTS based network and thus does not support CDMA and/or Wi-Fi phones  - False True

[S6] IMS components talk (extended) SIP to each other. However there is no real equivalence between them and the classic SIP components (e.g. SIP proxy), because of their cellular nature  - False True

[S7] The S-CSCF talks SIP to the SIP AS (Application Server), SIP to the Parlay AS and MAP to the CAMEL AS  - False True

[S8] MGCF, BGCF and MGW are needed only in IMS networks that support calls from/to the circuit switched domain  - False True

[S9] Once IMS domain is in place, it is highly desired (for QoS, security and billing reasons) that every type of IP traffic go via it. This includes Web browsing or/and email traffic  - False True

[S10] P-CSCF is always located in the visited/serving domain. However, if the subscriber is not roaming then the P-CSCF serving him/her will be located in the home domain of this subscriber  - False True