A.The ACL applied to the vty lines has no in or out option like ACL being applied to an interface.
B.The ACL is applied to the Telnet port with the ip access-group command.
C.The ACL must be applied to each vty line individually.
D.The ACL should be applied to all vty lines in the in direction to prevent an unwanted user from connecting to an unsecured port.

A.It cannot support UDP flows.
B.It cannot ensure each TCP connection follows a legitimate TCP three-way handshake.
C.It cannot detect application-layer attacks.
D.The status of TCP sessions is retained in the state table after the sessions terminate.