Question

For a clearer view of Nagle's algorithm, let us repeat the previous problem, but let the server transport layer acknowledge a segment when there is a previous segment that has not been acknowledged (every other segment) or a timer times out after 60 ms. Show the time line for this scenario.

Answer 1

The timeline for Nagle's algorithm in the given scenario is shown. Acknowledgment is sent when either half of the previous segments are acknowledged or a timer times out after 60 ms.

Step-by-step explanation:

Nagle's algorithm is a TCP congestion control algorithm. In this scenario, the server transport layer acknowledges a segment when either half of the previous segments have been acknowledged, or a timer times out after 60 ms. Let's assume that the segments are numbered from 1 to 10, with one segment sent every 20 ms. Here is the timeline for this scenario:

1. Time 0 ms: Segment 1 is sent.
2. Time 20 ms: Segment 2 is sent.
3. Time 40 ms: Segment 3 is sent.
4. Time 60 ms: Segment 1 is acknowledged.
5. Time 80 ms: Segment 4 is sent.
6. Time 100 ms: Segment 5 is sent.
7. Time 120 ms: Segment 2 is acknowledged.
8. Time 140 ms: Segment 6 is sent.
9. Time 160 ms: Segment 7 is sent.
10. Time 180 ms: Segments 3 and 4 are acknowledged.
11. Etc.

In this scenario, the server waits for either 60 ms to elapse or half of the previous segments to be acknowledged before sending a new acknowledgment.