TCP Reno is a version of the Transmission Control Protocol (TCP) designed to improve data transmission over networks. It uses a method called "congestion control" to manage network traffic, ensuring that data packets are sent efficiently without overwhelming the network. This helps maintain a stable connection and reduces the chances of packet loss. One of the key features of TCP Reno is its use of "slow start" and "congestion avoidance" algorithms. During slow start, the transmission rate increases exponentially until a threshold is reached. After that, it switches to congestion avoidance, where the rate increases more gradually, allowing for better management of network resources.