Question: Why must a reliable transport layer protocol be responsible for end-to-end flow control ? The sliding window protocol cannot be implemented at any other layer

Why must a reliable transport layer protocol be responsible for end-to-end flow control ? The sliding window protocol cannot be implemented at any other layer in the protocol architecture It is not possible to implement flow control within the application layer lower layers are either unreliable (best-effort) or not responsible for end-to-end delivery @ The network layer is usually too busy to worry about flow control on top of everything else that it does

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