EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?

Which of the following descriptions are correct? (Multiple choice)

Which of the following bridges are used to forward data based on the MAC address and VLAN ID carried in the data?

In which of the following networking types is the 1+1 protection on the board mainly used? (Multiple choice)

Which of the following statements regarding multiplexing partial remote False indication (MS-REI) is correct?
(1) B2 bytes indicate the transmission channel.
(2) The M1 byte represents the transmission channel
(3) THE MS-REl is sent from the receiver to the source.
(4) MS-REI is transmitted from the source to the receiver.
(5) Indicates the number of bit Falses detected by the receiver after receiving the MS signal.