The list was looped, so the last machine would send the packet back to the first.

For a protocol using small packets, this delay can be larger than the time needed to send a packet.

A network collision occurs when more than one device attempts to send a packet on a network segment at the same time.

It was often easier, however, even in this special case, to send the packet out the bus and receive it from the bus.

A status of retry requests the originator of the request to send the packet again.