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Computer Networking: Difference between revisions
→Physical Layer
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* Frequency-division Multiplexing/Duplex (FDD) - with multiple frequencies, you can send and receive at the same time on separate frequencies. If the frequencies are evenly divided, you will have full duplex. | * Frequency-division Multiplexing/Duplex (FDD) - with multiple frequencies, you can send and receive at the same time on separate frequencies. If the frequencies are evenly divided, you will have full duplex. | ||
* Echo Cancellation - by sending and receiving on the same frequencies at the same time, you can get full duplex. This is more complicated than the other options. | * Echo Cancellation - by sending and receiving on the same frequencies at the same time, you can get full duplex. This is more complicated than the other options. | ||
===Terminology=== | |||
* US/DS - Upstream and downstream | |||
* OOB - out of band, additional signals on a separate frequency or wire | |||