Regarding the sequence of file filtering technology processing flow, which of the following is correct?
(1) The security policy is applied as permit
(2) Protocol decoding
(3) File type recognition
(4) Application recognition
(5) File filtering

• A.(1)(2)(3)(4)(5)
• B.(1)(3)(2)(4)(5)
• C.(1)(4)(2)(3)(5)
• D.(1)(2)(4)(3)(5)

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Which of the following options does not belong to the characteristics of big data technology?

• A.Variety of data
• B.Low value density
• C.Slow processing
• D.Huge amounts of data

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The following figure is the diagram which shows the firewall and sandbox system linkage detection file.

The Web Reputation feature is enabled on the firewall, and Site A is set as a trusted site and Site B is set as a suspicious site. Which of the following statements is correct?

• A.Assume that Site A is an unknown website, the administrator cannot detect the website's traffic file.
• B.After the detection node detects a suspicious file, it not only informs the firewall in the figure, but also informs other connected network devices.
• C.When the user visits the Site B, although the firewall will extract the file and send it to the detection node, the user can still visit the Site B normally during the detection process.
• D.The files which the users obtain from Site A and Site B are sent to the detection node for detection.

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Regarding the description of keywords, which of the following is correct? (multiple choice)

• A.Custom keywords can only be defined in text mode.
• B.Keywords include predefined keywords and custom keywords.
• C.The minimum length of the keyword that the text can match is 2 bytes. ,
• D.Keywords are the content that the device needs to recognize during content filtering.

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Which of the following is correct about worms and viruses?

• A.The worm is parasitic
• B.The virus is mainly transmitted through system loopholes
• C.The worm is infected with other computer systems on the network
• D.Viruses exist independently in computer systems

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