A.It is recommended to turn on the switch at the edge of the network.

B.The port with root protection enabled will enter the error-down state after receiving the RST BDPU with higher priority

C.After receiving the RST BPDU with a higher priority, the port with root protection enabled will resume the normal forwarding state if it does not continue to receive the RST BPDU with a higher priority for a period of time.

D.Turning on the root protection function on the root port will take effect.

A.R3 must be the DIS of a level-2 link

B.The R3 router is a level-1-2 router

C.R3 router system ID is 0003.0000.0000

D.R3 must be the DIS of a level-1 link

A.Check the IP address of the VLANIF interface

B.Check which WLANs are currently created

C.View all configurations that contain the keyword "VLAN"

D.Check the physical interface information bound under each LAN

A.The routing policy mainly controls the import, publication and reception of routing information

B.The routing policy is mainly to control the forwarding of packets, that is, it is not necessary to forward packets according to the routing table

C.Policy routing mainly controls the import, publication, and reception of routing information.

D.Policy routing mainly controls the forwarding of packets, that is, it can forward packets without following the routing table.

A.The sending destination address is 2.2.2 2 data packets are sent directly without tagging.

B.When sending a data packet whose destination address is 4.4.4.4, it is sent directly without tagging.

C.When sending a packet whose destination address is 3.3.3.3, tag 1026 and send it.

D.When the router receives a packet with a label of 1024, it will replace the label with 1027 and send it.