| 单词 | HDX (Half DupleX) |
| 释义 | HDX (Half DupleX) 1. A transmission path, circuit, or channel designed to support information trans- fer in both directions, but only one direction at a time.The physical circuit may be capable of supporting full duplex transmission, i.e., simultaneous transmission in both directions, but the protocol may be half duplex. 2. A protocol, such as polling, that operates on a query/response basis, with a back-and-forth dialogue between the polling device and the polled devices. A full duplex (FDX) protocol differs in that it will support simultaneous operation in both directions. See also FDX and simplex. |
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