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In stop-and-wait flow control, what does the sender do after sending one frame?

easy📝 Conceptual Q2 of 15
Computer Networks - Physical and Data Link Layer
In stop-and-wait flow control, what does the sender do after sending one frame?
ASends the next frame immediately without waiting
BSends all frames at once without waiting
CSends a negative acknowledgment
DWaits for an acknowledgment before sending the next frame
Step-by-Step Solution
Solution:

  1. Step 1: Recall stop-and-wait behavior

    Sender sends one frame and waits for acknowledgment before next.

  2. Step 2: Confirm sender action

    Waiting ensures receiver received frame correctly before continuing.

  3. Final Answer:

    Waits for an acknowledgment before sending the next frame -> Option D

  4. Quick Check:

    Stop-and-wait = Wait for ACK [OK]
Quick Trick: Stop-and-wait pauses after each frame [OK]
Common Mistakes:
MISTAKES
  • Assuming sender sends multiple frames at once
  • Confusing acknowledgment with negative acknowledgment
  • Thinking sender sends next frame immediately

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