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

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Which of the following descriptions is wrong about the source of electronic evidence?

• A.Fax data, mobile phone recording is an electronic evidence related to communication technology.
• B.Operating system, e-mail, chat records can be used as a source of electronic evidence
• C.Database operation records, operating system logs are computer-related electronic evidence
• D.Movies and TV shows belong to electronic evidence related to network technology.

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Which of the following is the encryption technology used in digital envelopes?

• A.Stream encryption algorithm
• B.Asymmetric encryption algorithm
• C.Symmetric encryption algorithm
• D.Hash algorithm

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Which of the following attacks can DHCP Snooping prevent? (Multiple Choice)

• A.Intermediaries and IP/MAC spoofing attacks
• B.DHCP Server counterfeiter attack
• C.IP spoofing attack
• D.Counterfeit DHCP lease renewal packet attack using option82 field

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Classify servers based on the shape, what types of the following can be divided into? (Multiple choice)

• A.Tower server
• B.Rack server
• C.Blade sen/er
• D.X86 server

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