单项选择题

When configuring Cisco IOS login enhancements for virtual connections， what is the "quiet period"？（）

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

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单项选择题

For the following options ，which one accurately matches the CLI command（s） to the equivalent SDM wizardthat performs similar configuration functions？（）

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

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B.takes a variable-length message and produces a 168-bit message digest
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Which statement best describes configuring access control lists to control Telnet traffic destined to therouter itself？（）

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.