EE 281 Lecture Notes - Lecture 3: Wi-Fi, Path Mtu Discovery, Ieee 802.11
Document Summary
The receiver must also maintain a window since it may receive packets out of sequence and needs to buffer them. Whenever a packet is received in sequence, it can be delivered to the application. The receive window slides to the slot for the first non- received packet. Every transmitted packet has a separate timer associated with it. If an acknowledgement is not received successfully within that time, that specific packet is retransmitted. The receiver will acknowledge the packet if it fits in the window or if it is sequenced before the window. This latter case means that the packet is a duplicate of a packet that was already received and delivered to the application. If the packet is beyond the receiver"s window, it has no room to accept the packet and will ignore it. Tcp, the transmission control protocol, is the dominant transport protocol on the internet.
