What are the correct descriptions of the working principle of the Layer 2 Ethernet switch in the following options? (Multiple choice)

All data frames on the network segment connected to the receiving port
Establish a MAC address table by using the destination MAC address in the received data frame.
Look up the destination MAC address in the data frame in the MAC address table, send the data frame to the corresponding port if it is found (excluding the source port); if not found, go to all ports except the source port send
Address table maintenance using the address aging mechanism

Answer(s): A,C,D

Which of the following is the correct description of the Message Age in the configuration BPDU packet? (Multiple choice)

If the configuration BPDU is sent by the root bridge, the Message Age is 1.
Message Age is the total time that the BPDU is sent from the root bridge to the current bridge.
In actual implementation, the BPDUs are configured to pass through a bridge, and the Message Age is increased by 1.
The value of Message Age will not exceed 15

Answer(s): B,C