单项选择题

A.when the remote VPN peer is behind a NAT deviceB.when……

A route-based VPN is required for which scenario？（）

A.when the remote VPN peer is behind a NAT device
B.when multiple networks need to be reached across the tunnel and GRE cannot be used
C.when the remote VPN peer is a dialup or remote access client
D.when a dynamic routing protocol is required across the VPN and GRE cannot be used

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热门试题

单项选择题WhichattributeisoptionalforIKEphase2negotiations？（）

A.proxy-ID
B.phase 2 proposal
C.Diffie-Hellman group key
D.security protocol （ESP or AH）

单项选择题WhichattributeisrequiredforallIKEphase2negotiations？（）

A.proxy-ID
B.preshared key
C.Diffie-Hellman group key
D.main or aggressive mode

单项选择题TwoVPNpeersarenegotiatingIKEphase1usingmainmode.Whichmessagepairinthenegotiation containsthephase1proposalforthepeers？（）

A.message 1 and 2
B.message 3 and 4
C.message 5 and 6
D.message 7 and 8

单项选择题WhichoperationalmodecommanddisplaysallactiveIPsecphase2securityassociations？（）

A.show ike security-associations
B.show ipsec security-associations
C.show security ike security-associations
D.show security ipsec security-associations

多项选择题RegardinganIPsecsecurityassociation（SA），whichtwostatementsaretrue？（）

A.IKE SA is bidirectional.
B.IPsec SA is bidirectional.
C.IKE SA is established during phase 2 negotiations.
D.IPsec SA is established during phase 2 negotiations.