Which of the following is not a Layer 2 VPN technology?

• A.L2TP
• B.PPTP
• C.IPsec
• D.L2F

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For the description of buffer overflow attacks, which of the following options are correct? (Multiple choice)

• A.Buffer overflow attack is one of the common methods in the behavior of attacking software systems
• B.Buffer overflow attacks exploit the flaws of the software system's memory operations to run attack codes with high operating privileges.
• C.Buffer overflow attacks have nothing to do with the vulnerabilities and architecture of the operating system.
• D.Buffer overflow attacks are application layer attacks.

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Please match the following malicious code categories and descriptions[fill in the blank]

Correct Answer:

Virus: parasitic in the file, starts from the host program, destroys the file system: worm: has the ability to self-replicate and usually uses loopholes to spread to affect network performance or system performance:
Trojan horse: does not have the ability to self-replicate, usually used to remotely control broilers or stealing information)

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Which of the following is the correct order for incident response management?
1. detect
2. Report
3. ease
4. Lessons Learned
5. repair
6. recover
7. response

• A.1-3-2-7-5-6-4
• B.1-7-3-2-6-5-4
• C.1-2-3-7-6-5-4
• D.1-3-2-7-6-5-4

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Which of the following statements is true about Huawei's routers and switchers??(multiple choice)

• A.Routers can implement some security functions, and some routers can implement more security functions by adding security boards
• B.The main function of the router is to forward data. When the enterprise has security requirements, sometimes a firewall may be a more suitable choice
• C.The switch does not have security features
• D.Switches have some security functions, and some switches can realize more security functions by adding security boards

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