In the standard Ethernet with transmission rate of 10Mbps, assume that the…

Solution: Compute the transmission delay and propagation delay using the given values.

• Transmission delay (t_tx) = frame size (bits) / bandwidth

  Frame size = 512 bytes = 512 × 8 = 4096 bits. Bandwidth = 10 Mbps = 10 × 10^6 bits/s. t_tx = 4096 / 10,000,000 = 0.0004096 s = 409.6 µs.

• Propagation delay (t_prop) = distance / propagation speed

  Distance = 2500 m. Propagation speed = 2 × 10^8 m/s. t_prop = 2500 / (2 × 10^8) = 1.25 × 10^-5 s = 12.5 µs.

Answer: Transmission delay = 409.6 µs; Propagation delay = 12.5 µs.

Note: None of the provided options match these values. The key that gives a transmission delay of 51.2 µs assumes 512 bits instead of 512 bytes; that is the common mistake to avoid.