题目内容

1. Layer-2 channel vs. Layer-4 channel? (Compare theirchannel length, error, and latency distribution.)

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2. TCP vs. UDP? (Compare their connection manage-ment, error control, and f ow control.)

3. Why does most real-time tra c run over UDP?

4. What mechanisms are needed to support error controlin TCP?

5. Why does TCP need three-way handshake, instead otwo-way, in connection setup?