What are the three features in bridge?

When the packet arrives at one of the ports of bridge, what is the first thing the bridge does for this packet?

Bridge check for the destination to decide which port it will forward. There are three cases when it checks for the destination address. What are the three cases and how the bridge decides on each case?

Explain how the switch learns the address dynamically.

$($Problem $5-7).$ Assume $4$ LANs are connected by bridges as shown below figure and mac address I table at each bridge is initially empty.

Station C in LAN$2$ transmits a packet to station $G.$ Show the updated mac address table for each bridge from this transmission and explain how each bridge forwards the packet.

After the first transmission as in problem $5,$ station $E$ sends a packet to station $A.$ Which station$($s$)$ receive$($s$)$ this message? Explain how.

Assume all station transmit message to other stations and bridges learn all location of stations. Show mac address table at each bridge at this stage.

What are the possible problems when loop exists on the network?

Loop is not always bad. Why the loop is required?

Explain why the spanning tree algorithm does not fine the optimal route to the destination.