Date Added: Jun 2013
Congestion has been considered as one of the basic important issue in packet switched network. Congestion control refers to the mechanisms and techniques to control the congestion and keep the load below the capacity. In data networking and queuing theory, network congestion occurs when a link or node is carrying so much data that its quality of service deteriorates. Typical effects include queuing delay, packet loss or the blocking of new connections. A consequence of these latter two is that incremental increases in offered load lead either only to small increase in network throughput, or to an actual reduction in network throughput.