After the link authentication is completed, the STA will continue to initiate link service negotiation. The specific negotiation is realized through which of the following messages?

Bandwidth determines the rate of data transmission, and the maximum bandwidth of transmission is determined by the minimum link bandwidth on the transmission path.

When the AP and AC are in different three-layer networks, which method is recommended for the AP to discover the AC?

In the SNMP protocol by default, which port number is used by the agent process to send alarm messages to the NMS?

The Radius information configuration of the router is shown in the figure, which of the following statements is correct? (Multiple choice)
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Radius-server template huawei
Radius-server share-key cipher huawei
Radius-server authentication 200.0.12.1 1812
Radius-server accounting 200.0.12.1 1813
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