Which of the following statement about the SSH connection is wrong?

• A.SSH protocol can encrypt all transmitted data, effectively preventing information leakage during remote management process
• B.SSH can be applied to remote encrypted connections, file transfer encryption
• C.From the client side, SSH provides two levels of security verification
• D.SSH protocol works at the network layer

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Which of the following descriptions about the PC roaming process between different AP is wrong?

• A.PC sends 802.11 request frame to new AP in various channels
• B.The new AP sends a response message after receiving the request frame from the PC
• C.The PC can establish a new connection after receiving the new AP response message
• D.The PC sends an association request request after receiving the new AP response message, and then establishes a new connection

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What are the main congestion management technologies in OLT? (Multiple choice)

• A.WRED
• B.PO
• C.PQ+WRR
• D.WRR

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LACP aggregation and docking equipment determines the port to accept the service according to the LACP priority of the active port. If there are multiple ports with the same LACP priority, which of the following statement is correct?

• A.When the LACP priority of the port is the same, the active port is determined according to the port ID
• B.When the LACP priority of the port is the same, the active port is randomly selected
• C.When the LACP priority of the port is the same, the active port is determined according to the port MAC
• D.When the LACP priority of the port is the same, determine the active port according to the port IP

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The network management U2000 adds a line template to realize the mapping of user service flow to GEM PORT. The mapping mode includes: (Multiple Choice)

• A.MAC
• B.VLAN
• C.PORT
• D.802.IP

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