A.AIS

B.IAE

C.LCK

D.OCI

A.Use the address aging mechanism to maintain the MAC address table

B.The network managed by the switch belongs to a broadcast domain

C.Learning based on the source MAC address and forwarding based on the destination MAC address

D.When the destination MAC in the received Ethernet frame is not in its own address table, broadcast the frame to all ports

A.The gain medium of Raman amplifier is transmission fiber; the gain medium of EDFA is EDF (Erbium Doped Fiber)

B.The equivalent noise figure of a Raman amplifier is smaller than that of an EDFA

C.The gain calculation/testing method of Raman amplifier and EDFA is consistent, both are "gain = output power - input power

D.The Raman amplifier selects different pump sources to amplify signals in different bands, so the Raman amplifier has no gain bandwidth limit in theory, while the EDFA has a range of gain bandwidth

A.M40V board OUT port

B.The OUT port of the OAU1 board

C.FEU board IN/OUT port

D.OTU unit line side port

A.If the MAC address entry of the device reaches the upper specification limit of the device, the device cannot learn new MAC address entries, and the packet is discarded.

B.If the destination MAC address of the packet is the broadcast MAC address, it will be flooded to all ports including the source port.

C.If the destination address of the packet is a unicast MAC address, but there is no corresponding entry in the MAC address table, the packet is discarded

D.If the destination address of the message is a unicast MAC address, look up the MAC address table, and if found, forward the frame to the corresponding port (excluding the source port)