After the firewall detects a virus, which of the following will release the virus?

• A.Hit virus exception
• B.Not a protocol supported by the firewall
• C.The source IP hits the whitelist
• D.Hit apply exception

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Which of the following options are the possible reasons for the problem that users cannot access network resources in the authentication-free two-way binding mode? (multiple choice)

• A.Authentication-free users and authenticated users are in the same security area
• B.The authentication action in the authentication policy is set to"Do not acknowledge/Certification-free"
• C.Online users have reached the maximum
• D.Authentication-free users do not use the specifiedIP/MACaddressPC

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Security technology has different methods in different technical levels and fields. Which of the following devices can be used for network layer security protection? (Multiple choice)

• A.Vulnerability scanning device
• B.Firewall
• C.Anti-DDoS device
• D.IPS/IDS device

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Which of the following options is the protocol number of GRE?

• A.89
• B.46
• C.50
• D.47

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Which of the following types of attacks are DDos attacks?

• A.Traffic attacks
• B.Malformed message attack
• C.Snooping scan attack
• D.Special message attack

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