A.Evaluate members of emergency response organizations

B.Evaluate the implementation of emergency plans and propose follow-up improvement plans

C.Establish a defense system and specify control measures

D.Judging the effectiveness of isolation measures

A.PPTP

B.L2F

C.IPsec

D.L2TP

A.After the network layer receives the data packet, the network layer information is stripped after parsing, and the upper layer processing protocol is known according to the parsing information, such as HTTP

B.After the application layer receives the data packet, the application layer information is stripped after parsing, and the final displayed user data is exactly the same as the data sent by the sender host

C.The data packet is first transmitted to the data link layer. After parsing, the data link layer information is stripped, and the network layer information is known according to the parsing information, such as:IP

D.transport layer (TCP) after receiving the data packet, the transport layer information is stripped after parsing, and the upper layer processing protocol is known according to the parsing information, such asUDP

A.Good scalability.

B.Suitable for encrypting large amounts of data.

C.High efficiency and simple algorithm.

D.The system overhead is small.