Editing Network congestion (section)

==Side effects of congestive collapse avoidance==

===Radio links===
The protocols that avoid congestive collapse generally assume that data loss is caused by congestion. On wired networks, errors during transmission are rare. [[WiFi]], [[3G]] and other networks with a radio layer are susceptible to data loss due to interference and may experience poor throughput in some cases. The TCP connections running over a radio-based [[physical layer]] see the data loss and tend to erroneously believe that congestion is occurring.

===Short-lived connections===
The slow-start protocol performs badly for short connections. Older [[web browser]]s created many short-lived connections and opened and closed the connection for each file. This kept most connections in the slow start mode. Initial performance can be poor, and many connections never get out of the slow-start regime, significantly increasing latency. To avoid this problem, modern browsers either open multiple connections simultaneously or [[HTTP persistent connections|reuse one connection]] for all files requested from a particular server.