单项选择题
One type of frame switching uses low-latency forwarding and then switches to a higher-latency error checking mode when an error threshold is exceeded. What is the name of this frame switching mode?（）
A. store and forward B. fragment-free C. adaptive cut-through D. fast-forward
单项选择题 What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?（）
多项选择题 What are the possible trunking modes for a switch port?（）
多项选择题 Which of the following are types of flow control?（）
