For the following attempts， which one is to ensure that no one employee becomes a pervasive securitythreat， that data can be recovered from backups， and that information system changes do not compromisea system’s security？（）

单项选择题WhichoneofthefollowingcommandscanbeusedtoenableAAAauthenticationtodetermineifausercanaccesstheprivilegecommandlevel？（）

A.aaa authentication enable method default
B.aaa authentication enable default
C.aaa authentication enable level
D.aaa authentication enable default local

单项选择题WhichtypeoffirewallisneededtoopenappropriateUDPportsrequiredforRTPstreams？（）

A.Stateful firewall
B.Proxy firewall
C.Packet filtering firewall
D.Stateless firewall

单项选择题Forthefollowingstatements，whichoneisperceivedasadrawbackofimplementingFibreChannelAuthenticationProtocol（FCAP）？（）

A.It is restricted in size to only three segments
B.It requires the use of netBT as the network protocol
C.It requires the implementation of IKE
D.It relies on an underlying Public Key Infrastructure

单项选择题Whichfirewallbestpracticescanhelpmitigatewormandotherautomatedattacks？（）

A.Segment security zones
B.Restrict access to firewalls
C.Use logs and alerts
D.Set connection limits

单项选择题Whichoneisthemostimportantbasedonthefollowingcommonelementsofanetworkdesign？（）

A.Business needs
B.Risk analysis
C.Security policy
D.Best practices