BGP is an inter-domain routing protocol. Which of the following descriptions of this protocol is correct? (Multiple choice)

The output information of a router is as follows, please match the information on the left with the information on the right.

In OSPF broadcast or NBMA network types, devices with a large DR Priority may not necessarily become DR.

The RSTP protocol provides a variety of protection functions. For example, when the edge port is configured in the protected state, after the edge port receives the BPDU message, what is the processing method?

Option 82 in the DHCP message is called the relay agent information option, from which the administrator can obtain a lot of information about the client. Option 82 can contain at most () Sub-Options.