2. Calculate the latency (from first bit sent to last bit received) for the following. Show your work: (40 pts) 100-Mbps Ethernet with a single store-and-forward switch in the path, and a frame size of 2,000 bits. Assume that each link introduces a propagation time of 0.2 and that the switch begins forwarding the frame as soon as it has finished receiving the entire frame (i.c., no queuing time) (a) Source Switch (Store-and-Forward) Destination (b) Same as (a) but the data are two 1000-bit frames, sent one right after the other. Same as (a) but assume the switch implements the "cut-through" switching method: It is able to begin forwarding the frame after the first 160 bits have been received (c) Source Switch (Cut-Through) Destination (d) Same as (c) but the data are two 1000-bit frames, sent one right after the other