DSA Factory
Free The transport layer lessonsThe transport layer · Stage 1 · Reliability and speed · Step 2

Flow control and the receive window

See how the receiver sets a limit on the sender, and why a small window cripples a long, fast link. About 12 minutes.

Quick check

A connection has a 64 KB receive window and a 200 ms round trip. About what is its maximum throughput?

  1. AAbout 2.6 Mbps
  2. B64 Mbps
  3. CThe full rate of the link
Show the answer

About 2.6 Mbps. 65,536 bytes × 8 ÷ 0.2 s = 2.6 Mbps, whatever the link's rate.

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4 questions on this idea

Short questions that apply the idea to new cases: trace it, work out a number, put steps in order. A wrong answer explains itself.

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