SMP1 takes into account many type of traffic (APC, AOC, and AOC NG), so it uses both the priorities and the environment state information (both network and system parameters are considered) as inputs to define the security policy (we call it the
Intra-class operational mode). On the other side, SMP2 considers only ATS traffic, so only the network and system state information are considered to define the security policy (Inter-class operational mode).