Question: 3. [20pt] Let's consider a source node A sends a packet of 1500 bytes to destination node B connected over three links (A----R1----2----B) where R1

3. [20pt] Let's consider a source node A sends a packet

3. [20pt] Let's consider a source node A sends a packet of 1500 bytes to destination node B connected over three links (A----R1----2----B) where R1 and R2 are two intermediate routers. The propagation speed on all three links is 2.5x10^8 m/s, the transmission rates of all three links are 1 Mbps, the packet processing delay is 2 msec, the length of the first link is 5,000 km, the length of the second link is 3,000 km, and the length of the last link is 2,000 km. a. What is the end-to-end delay? Meaning how much time it takes to receive the packet at destination B? b. Let's assume that the packet processing delay is 0. Suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before waiting for the entire packet to arrive. What is the end-to-end delay

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