In IPSEC VPN, which of the following scenarios can be applied by tunnel mode?

• A.between tunnel mode and transport mode
• B.between security gateways
• C.between hosts and security gateways
• D.between the host and the host

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HTTP packets are carried by UDP. and the HTTPS protocol is based on TCP three-way handshake. Therefore.
HTTPS is relatively secure, and HTTPS is recommended.

• A.True
• B.False

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Which statement about NAT is wrong? (Choose two.)

• A.NAT Outbound refers to conversion to the source IP address, NAT Inbound refers to conversion to the destination IP address
• B.Outbound direction NAT can support the following application modes: one-on-one, many-to-many and many-to-one
• C.NAT Inbound command and NAT Server command have the same functions, can choose to configure according to personal preference
• D.NAT technology can support multi-channel protocols such as FTP and other standard multi-channel protocol

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Which of the following is true about the description of the TCP/IP protocol stack packet encapsulation?
(Multiple choice)

• A.After the transport layer (TCP) receives the data packet, the transport layer information is stripped after parsing, and the upper layer processing protocol, such as UDP, is known according to the parsing information
• B.After receiving the data packet, the network layer is stripped after parsing, and the upper layer processing protocol is known according to the parsing information, such as HTTP
• C.After the application layer receives the data packet, the application layer information is stripped after parsing, and the user data displayed at the end is exactly the same as the data sent by the sender host.
• D.The data packet is firsttransmitted 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.

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Which of the following is the analysis layer device in the Huawei SDSec solution?

• A.CIS
• B.Firehunter
• C.Agile Controller
• D.switch

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