The default policy on the firewall defaults to ( ) all traffic. (fill in the blank)

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aboutSSL VPNdescription, which of the following is correct?

• A.existNATcrossing problem
• B.Can be used without a client
• C.yesIPlayer to encrypt
• D.No authentication required

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When an access user uses Client-InitiatedVPN to establish a tunnel with the LNS, how many PPP connections can one tunnel carry?

• A.3
• B.4
• C.1
• D.2

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For data communication between the two communicating parties, if an asymmetric encryption algorithm is used for encryption, when A sends data to B, which of the following keys will be used for data encryption?

• A.A's private key
• B.B's private key
• C.B's public key
• D.A's public key

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Which of the following descriptions about dual-system hot backup is wrong?

• A.The preemption delay is 60s by default
• B.The active preemption function is enabled by default
• C.Whether it is a Layer 2 or Layer 3 interface, whether it is a business interface or a heartbeat interface, it needs to be added to the security zone
• D.The dual-system hot backup function requires license support

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