During the use of the server, there are various security threats. Which of the following options is not a server security threat?

• A.hacker attack
• B.DDosattack
• C.natural disaster
• D.malicious program

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Regarding the sequence of call establishment procedures for L2TP corridors, which of the following descriptions is correct?
1. Establish L2TP tunnel
2. Establish a PPP connection
3. LNS authenticates users
4. User access to intranet resources
5. Establish an L2TP session

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

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What is the corresponding warning level for major network security incidents?

• A.Orange Alert
• B.red alert
• C.blue alert
• D.Yellow Alert

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When IPSec VPN uses transport mode to encapsulate packets, which of the following is not in the certification scope of the ESP security protocol?

• A.ESP Iail
• B.ICP Header
• C.IP Header
• D.ESP Header

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When configuring the security policy, ______ can control the flow based on the user.

• A.Services and applications

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