Which item is correct regarding Cisco IOS IPS on Cisco IOS Release 12.4（11）T and later ？（）

单项选择题AfterenablingportsecurityonaCiscoCatalystswitch，whatisthedefaultactionwhentheconfiguredmaximumofallowedMACaddressesvalueisexceeded？（）

A.The port’s violation mode is set to restrict
B.The port is shut down
C.The MAC address table is cleared and the new MAC address is entered into the table
D.The port remains enabled， but bandwidth is throttled until old MAC addresses are aged out

单项选择题Streamciphersrunonwhichofthefollowing？（）

A.Fixed-length groups of digits called blocks
B.Individual blocks，one at a time，with the transformations varying during the encryption
C.Individual digits，one at a time，with the transformations varying during the encryption
D.Fixed-length groups of bits called blocks

单项选择题Whatistheobjectiveoftheaaaauthenticationloginconsole-inlocalcommand？（）

A.It specifies the login authentication method list named console-in using the local user database on the router
B.It specifies the login authorization method list named console-in using the local RADIUS username-password data base
C.It specifies the login authentication list named console-in using the local username- password data base on the router
D.It specifies the login authorization method list named console-in using the local username- password data base on the router

多项选择题WhichstatementbestdescribestheTurboACLfeature？（）

A.The Turbo ACL feature processes ACLs into lookup tables for greater efficiency
B.The Turbo ACL feature leads to increased latency， because the time it takes to match the packet isvariable
C.The Turbo ACL feature leads to reduced latency， because the time it takes to match the packet is fixedand consistent
D.Turbo ACLs increase the CPU load by matching the packet to a predetermined list

多项选择题Whichthreeprotocolsarematchedbythe sdm-cls-insp-traffic classmap？（）

A.pop3
B.ftp
C.12tp
D.sql-net