1 Michael Jenkins Host - to - Host Congestion Control for TCP

Afanasyev and company composed a paper detailing different host-to-host congestion control protocols for the Transmission Control Protocol (TCP). Within each different technique, they outlined its purpose and the intended environment for which the protocol was designed. TCP Tahoe is one of the earliest host-to-host solutions on which many of the other systems are based and which is still in used today. TCP Tahoe uses the idea of slow start when an error is detected. Once one packet has been lost, TCP Tahoe reduces the number of messages it sends, reduces the window size of sent messages, and slowly increases the number of messages sent by a set amount until a max value is reached. TCP Reno is another solution that builds upon the idea of TCP Tahoe. By reducing the window size at the first error, TCP Tahoe has a chance to needlessly decrease throughput. Reno uses the idea of a fast start when it detects a light load on the network. This decreases the time it spends in slow start, and increases the throughput of the algorithm. TCP Vegas uses a slightly different approach than Tahoe or Reno to provide congestion avoidance and detection. Vegas uses the idea of a stable congestion window, by not hitting the max output and by only slightly changing the average window size, Vegas can achieve a higher throughput without the large hits the previous two styles take.