Consider the LAN below consisting of 12 computers (A-L) connected by two Ethernet bridges. At t=0 the bridging table entries for both bridges are empty. At t = 1, node L sends to node E, and node E replies immediately (well before the next time step).

What are the (MAC address, interface) entries in the bridging tables right after these transmissions?

Note: interface = port number

a) Left-hand-side bridge: (L,15), (E, 8).

Right-hand-side bridge: (L,7), (E, 5).

b) Left-hand-side bridge: (L,8), (E, 8).

Right-hand-side bridge: (L,7), (E, 7).

c) Left-hand-side bridge: (L,15), (E,5).

Right-hand-side bridge: (L,7), (E, 8).

d) Left-hand-side bridge: (L,8), (E,8).

Right-hand-side bridge: (L,7), (E, 7).