In order to control traffic, a network router, $A$ periodically sends a message to its neighbor, $B,$ telling it to increase or decrease the number of packets that it can handle. At some point in time, Router $A$ is flooded with traffic and sends $B$ a message telling it to cease sending traffic. It does this by specifying that the number of bytes $B$ may send ($A’s$ window size) is $0.$ As traffic surges decrease, A sends a new message, telling $B$ to restart transmission. It does this by increasing the window size from $0$ to a positive number. That message is lost. As described, neither side will ever transmit. What type of deadlock is this?
