Which of the following statements about VLANIF interfaces is correct?

On the interface serial 1/0/1 of RTA, the command "ip address unnumbered interface loopback 0" has been configured.

Which following statements are correct? (Choose two).

Which commands can be used to check the PPPoE client session status?

Switch-A and Switch-B are configured separately in the R & D department, sales department, product department, the Ministry of Finance and Personnel in the VLAN port. Each VLAN contains 20 users. At least the number of subnets to route between all VLAN connectivity ().

The following is a description of the Forwarding state description error in the spanning tree protocol ().