Consider an error-free 64 kbps satellite channel used to send 512-byte data frames in one direction with very short acknowledgements coming back the other way. What is the maximum throughput for window size of 15?

Correct option is C

The maximum throughput of a channel is determined by the channel's bandwidth when acknowledgments do not cause significant delays. For a window size of 15, the system achieves full utilization of the 64-kbps bandwidth.
Information Booster
1. Bandwidth Utilization: The throughput reaches the channel capacity when the window size is sufficient to keep the channel busy.
2. Calculation:
· Frame size = 512 bytes = 4096 bits.
· Channel bandwidth = 64 kbps.
· Time to transmit one frame = 4096 bits / 64 kbps = 64 ms.
3. Window Size Impact: With a window size of 15, multiple frames are in transit, ensuring no idle time.
4. Maximum Throughput: Throughput = Bandwidth = 64 kbps.
Additional Knowledge
· A smaller window size reduces throughput due to idle periods.
· Higher bandwidth allows more data to be transmitted in a given time.
· Acknowledgments impact throughput only when round-trip delays are significant.