Regarding the description of the vulnerability scanning, which of the following is wrong?

• A.Vulnerability scanning can be done based onthe results of ping scan results and port scan
• B.Vulnerability scanning is a technology based on network remote monitoring of target network or host security performance vulnerability, which can be used for simulated attack experiments and security audits.
• C.Vulnerability scanning is a passive preventive measure that can effectively avoid hacker attacks.
• D.Vulnerability scanning is used to detect whether there is a vulnerability in the target host system.
  Generally, the target host is scanned for specific vulnerabilities.

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The scene of internal users access the internet as shown, the subscriber lineprocesses are:
1. After authentication, USG allow the connection
2. The user input http://1.1.1.1 to access Internet
3. USG push authentication interface. User =? Password =?
4. The user successfully accessed http://1.1.1.1, equipment create Session table.
5. User input User = Password = *** which the following procedure is correct?

• A.2-3-5-1-4
• B.2-3-1-5-4
• C.2-1-3-5-4
• D.2-5-3-1-4

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Regarding the HRP master and backup configuration consistency check content, which of the following is not included?

• A.Is the heartbeat interface configured with the same serial number?
• B.Next hop and outbound interface of static route
• C.Authentication Policy
• D.NAT policy

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As shown in the figure, a TCP connection is established between client A and server B Which of the following two "Tpacket numbers should be?

• A.a+1: a
• B.a+1: a+1
• C.b+1: b
• D.a: a+1

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Which of the following is not a hash algorithm?

• A.SHA1
• B.SM1
• C.SHA2
• D.MD5

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