类别转换(class switching)]

报文交换（message switching）无需进行报文拆分与重组，因此比分组交换（packet switching）效率高。

The transistor inside the switching regulator works in a linear state. A: Correct B: Wrong

After having switched off the mains separator, wait for ___________ before switching it back on.

中国大学MOOC: The earliest equipment for simultaneous interpreting (microphone, earphones, and switching equipment) was manufactured by ______________.

Which ____________ do I press to turn it off? A: switched B: switch C: switches D: switching

During each switching cycle, the energy dissipation has no dependence on the resistance of the device. A: ) True B: ) False

The shortcut key for switching text window in CAD is ( ) A: F1 B: F2 C: F3 D: F4

In which three network technologies is traffic shaping used to prevent and manage congestion？（） A: Asynchronous Transfer Mode （ATM） B: data-link switching （DLSw） C: Route Processor Redundancy （RPR） D: Frame Relay （FR）  E: Metro Ethernet F: Multiprotocol Label Switching （MPLS）

MPLS使用标记交换（Label Switching），网络路由器只需要判别标记后即可进行转送处理。