What are three main phases of an attack？（）

多项选择题WhichtwostatementsabouttheuseofSCREENoptionsarecorrect？（）

A.SCREEN options are deployed at the ingress and egress sides of a packet flow.
B.Although SCREEN options are very useful， their use can result in more session creation.
C.SCREEN options offer protection against various attacks at the ingress zone of a packet flow.
D.SCREEN options examine traffic prior to policy processing， thereby resulting in fewer resouces used formalicious packet processing.

多项选择题WhichtwoexternalauthenticationservertypesaresupportedbyJUNOSSoftwareforfirewalluser authentication？（）

A.RADIUS
B.TACACS+
C.LDAP
D.IIS

多项选择题Whichtwostatementsregardingexternalauthenticationserversforfirewalluserauthenticationaretrue？（）

A.Up to three external authentication server types can be used simultaneously.
B.Only one external authentication server type can be used simultaneously.
C.If the local password database is not configured in the authentication order， and the configured authentication server is unreachable， authentication is not performed.
D.If the local password database is not configured in the authentication order， and the configured authentication server rejects the authentication request， authentication is not performed

多项选择题Whichtwocommandscanbeusedtomonitorfirewalluserauthentication？（）

A.show access firewall-authentication
B.show security firewall-authentication users
C.show security audit log
D.show security firewall-authentication history

单项选择题YouarenotabletotelnettotheinterfaceIPaddressofyourdevicefromaPConthesamesubnet.Whatiscausingtheproblem？（）

A.Telnet is not being permitted by self policy.
B.Telnet is not being permitted by security policy.
C.Telnet is not allowed because it is not considered secure.
D.Telnet is not enabled as a host-inbound service on the zone