2 / 13 Congestion Control & Flow Control

Zero Window

The receiver advertises a window size of 0 bytes. What does the sender do?

A

The sender resets cwnd to 1 MSS and re-enters slow start

B

The sender closes the connection because the receiver can no longer accept data

C

The sender continues transmitting at a reduced rate of 1 segment per RTT

D

The sender stops transmitting data and starts a persist timer, periodically sending 1-byte window probe segments to check if the window has reopened