Which statement about the Hybrid port is correct?

In the WLAN architecture, the FIT AP cannot work independently and needs to be managed by AC.
Which of the following protocols are used to communicate between FIT AP and AC.? ()

Which parameter is used in the spanning tree protocol for root bridge election?

If the transport layer protocol is UDP, the value of the network layer Protocol field is 6.

The link aggregation interface can only be used as a Layer 2 interface.