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A sender uses the Stop-and-Wait $\text{ARQ}$ protocol for reliable transmission of frames.

Frames are of size $1000 \; \text{bytes}$ and the transmission rate at the sender is $80 \; \text{Kbps (1 Kbps = 1000 bits/second)}.$ Size of an acknowledgement is $100 \; \text{bytes}$ and the transmission rate at the receiver is $8 \; \text{Kbps}.$ The one-way propagation delay is $100 \; \text{milliseconds}.$ Assuming no frame is lost, the sender throughput is ___________ $\text{bytes/second}.$

  1. $2500$
  2. $2000$
  3. $1500$
  4. $500$
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