A.DoS B.exploit C.propagation D.port scanning E.reconnaissance
A.SCREEN options are deployed at the ingress and egress sides of a packet flow. B.Although SCREEN options are very useful, their use can result in more session creation. C.SCREEN options offer protection against various attacks at the ingress zone of a packet flow. D.SCREEN options examine traffic prior to policy processing, thereby resulting in fewer resouces used formalicious packet processing.
A.RADIUS B.TACACS+ C.LDAP D.IIS