Among the routing policy tools commonly used by BGP, which ones can be used to filter routes?

The topology diagram and configuration are as follows, and now we hope that there is no buttoned route entry of 10033/32 in the Rl route table

There is a concept of FEC-Forwarding Equivalence Class in MPLS, so what criteria can FEC not allocate based on?

The default configured switch has an empty MAC address table at this time , and Host A connected to the switch issues the first unicast data frame, so what will the switch do after receiving the teaching system?( Single choice questions).

ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)