VPN tunnel technology refers to through encryption algorithm (such as DES, 3DE5) to achieve data transmitted in the network will not be intercepted.

• A.True
• B.False

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Which of the following is not part of adigital certificate?

• A.Validity period
• B.Issuer
• C.Private key
• D.Public key

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In the IPSec VPN transmission mode, which part of the data packet is encrypted?

• A.New IP packet header
• B.Network layer and upper layer data packet
• C.Original IP packet header
• D.Transport layer and upper layer data packet

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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 of the following options is not the part of the quintet?

• A.Destination IP
• B.Destination Port
• C.Source IP
• D.Source MAC

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