Which of the following areFTPThe standard port number of the protocol? (multiple choice)

• A.20
• B.80
• C.twenty one
• D.twenty three

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About SSL VPN technology, which of the following statement is wrong?

• A.Encryption of SSL VPN technology only takes effect on the application layer
• B.SSL VPN technology is perfect for NAT traversal scenarios
• C.SSL VPN technology expands the network range of enterprises
• D.SSL VPN requires dial client

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Please sort the following digital envelope encryption and decryption process correctly.

• A.After receiving the encrypted information from A, B uses its own private key to open the digital envelope to obtain the symmetric key.
• B.B uses the symmetric key to decrypt the ciphertext information to obtain the original plaintext.
• C.A sends the digital envelope and cipher text information to B
• D.uses B's public key to encrypt the symmetric key to generate a digital envelope
• E.uses a symmetric key to encrypt the plaintext to generate ciphertext information.

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The default authentication domain of the USG6000 series firewall is the _____ domain.[fill in the blank]*

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Regarding the firewall security strategy, which of the following is wrong?

• A.If the security policy is Permit, the discarded message will not be accumulated "hitting"
• B.Huawei USG series firewall security strategy entry cannot exceed 128
• C.When configuring the security policy name, you cannot reuse the same name.
• D.Adjust the order of the security policy, do not need to save the configuration file, take effect immediately

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