Calculate the latency (from first bit sent to last bit received) for the following: 100-Mbps Ethernet with a single store-and-forward switch in the path and a packet size of 12,000 bits. Assume that each link introduces a propagation delay of 20 us and that the switch begins retransmitting immediately after it has finished receiving the packet. The answer choices in microseconds are: a. 130, b. 140, c. 150, d. 260, e. 280, f. 300.

This question has been previously answered using 10 us instead of 20.