About VRRP packets, which of the following statements is correct? (Choose two answers)

• A.VRRP packets using TCP
• B.VRRP packet destination address is 224.0.0.18
• C.VRRP packets using UDP
• D.VRRP packet TTL value is 255

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When users use port forwarding, they cannot access intranet resources. Which of the following is not a possible cause of the failure?

• A.The user connection has timed out.
• B.Whether the virtual IP address is obtained on the virtual network card of the user PC.
• C.The security policy did not release traffic.
• D.Port forwarding is not enabled.

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About the description of the process of network expansion, which statement is wrong?

• A.After the network extension function is triggered, an SSL VPN tunnel needs to be established first between the remote user and the virtual gateway.
• B.After the remote user virtual network adapter obtained the private IP address, it need to manually configure the route to the intranet server so that the internal network resources can be accessed normally.
• C.The remote user's local PC automatically generates a virtual network adapter. The virtual gateway randomly selects an IP address from the address pool and assigns it to the remote user's virtual network adapter.
• D.The remote user sends a business request packet to the Server on the intranet. The packet arrives to the virtual gateway through the SSL VPN tunnel.

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An intranet has made a network, the old equipment is offline, the new network equipment is brought online, and after the service test, it is found that most of the original service traffic cannot work normally. What is the quickest way to restore the business?

• A.block method
• B.segmentation method
• C.replacement method
• D.layering method

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Which of the following statements about IKE v1 main mode and aggressive mode is correct?

• A.All negotiation packets in the first phase in aggressive mode are encrypted
• B.All negotiation packets in the first phase of the main mode are encrypted
• C.Whether the negotiation is successful or not, it will enter the fast mode
• D.Bare mode uses DH algorithm

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