A.Loopback interfaceB.Command and control interfaceC.Mo……

单项选择题WhenconfiguringCiscoIOSloginenhancementsforvirtualconnections，whatisthe quietperiod ？（）

A.The period of time in which virtual login attempts are blocked， following repeated failed login attempts
B.The period of time in which virtual logins are blocked as security services fully initialize
C.A period of time when no one is attempting tolog in
D.The period of time between successive login attempts

单项选择题Forthefollowingoptions，whichoneaccuratelymatchestheCLIcommand（s）totheequivalentSDMwizardthatperformssimilarconfigurationfunctions？（）

A.aaa configuration commands and the SDM Basic Firewall wizard
B.setup exec command and the SDM Security Audit wizard
C.auto secure exec command and the SDM One-Step Lockdown wizard
D.Cisco Common Classification Policy Language configuration commands and the SDM Site-to- Site VPN

单项选择题WhatistheMD5algorithmusedfor？（）

A.takes a fixed-length message and produces a 128-bit message digest
B.takes a variable-length message and produces a 168-bit message digest
C.takes a message less than 2^64 bits as input and produces a 160-bit message digest
D.takes a variable-length message and produces a 128-bit message digest ActualTests.com

单项选择题WhichstatementbestdescribesconfiguringaccesscontrolliststocontrolTelnettrafficdestinedtotherouteritself？（）

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.

单项选择题Whichfeatureisapotentialsecurityweaknessofatraditionalstatefulfirewall？（）

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.