The steps of the security assessment method do not include which of the following?

• A.data analysis
• B.Manual audit
• C.Questionnaire
• D.Penetration testing

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Regarding NAT address conversion, which of the following statements is wrong?

• A.Address conversion can provide FTP, WWW, Telnet and other services outside the local area network according to the needs of users
• B.For some TCP and UDP protocols (such as ICMP, PPTP), NAT conversion is not possible
• C.Some application layer protocols carry IP address information in the data, and when NAT is performed on them, the IP address information in the upper layer data must be modified
• D.Configure the NAT address pool in the source NAT technology, you can configure only one IP address in the address pool

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The method of collecting information by port scanning using scanning tools belongs to the means of ( ) analysis. (fill in the blank)

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Which of the following descriptions about dual-system hot backup is wrong? ( )[Multiple choice]*

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

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SIPprotocol usageSDPmessage to establish a session,SDPThe message contains a remote address or a multicast address

• A.True
• B.False

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