Fashion Design Course: Design Practice and Processes for Creating Hats, Bags, Shoes and More Accessories:

However, error control aside, there is another consideration that is actually more important: flow control. Many network interface chips are able to send consecutive packets with almost no gap between them, but they are not always able to receive an unlimited number of back-to-back packets due to finite buffer capacity on chip. With some designs, a chip cannot even accept two back-to-back packets because after receiving the first one, the chip is temporarily disabled during the packet-arrived interrupt, so it misses the start of the second one. When a packet arrives and the receiver is unable to accept it, an overrun error occurs and the incoming packet is lost. in practice, overrun errors are a much more serious problem than packets lost due to noise or other forms of damage. The two approaches of Fig. 2-25 are quite different with respect to overrun errors. With stop-and-wait, overrun errors are impossible, because the second packet is not sent until the receiver has explicitly indicated that it is ready for it. (Of course, with multiple senders, overrun errors are still possible.) With the blast protocol, receiver overrun is a possibility, which is unfortunate, since the blast protocol is clearly much more efficient than stop-and-wait ...»