Which of the following port states is not included in the RSTP protocol?

What is the transmission rate of an Eth-Trunk port in manual link aggregation mode related to? (Multiple choice)

As shown in the figure, all four switches run STP, and various parameters adopt default values. If the G0/0/2 port of switch C is blocked and the configuration BPDU cannot be sent through this port, how long will it take for the blocked port in the network to enter the forwarding state?

In order to implement the FIT AP online, the FIT AP first needs to obtain the IP address of the AC. Which of the following is not included in the method of obtaining the IP address of the AC by the FIT AP?

The IPv6 protocol uses NS and NA packets for duplicate address detection (DAD).