Flow control is a function that prevents network congestion by ensuring that (1) do not overwhelm (2) with data. There are three commonly used methods for handling network congestion. (3) is used by network devices to temporarily store bursts of excess data in memory until they can be processed. (4) are used by receiving devices to help prevent their buffers from overflowing. (5) is a flow -control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

3（）

A．Buffer

B．Source-quench messages

C．Buffering

D．Windowing

下列纺织工艺不属于我国四大名锦的是（）。

A.广西壮锦

B.苏州宋锦

C.河北经锦