4 / 13 Congestion Control & Flow Control

Explicit Congestion Notification

How does ECN (Explicit Congestion Notification) differ from traditional TCP congestion detection?

A

ECN only works with UDP, not TCP

B

ECN detects congestion faster by using shorter timeouts

C

Routers mark packets to signal congestion before dropping them

D

ECN replaces TCP's congestion window with a fixed sending rate