A telecommunications network that covers a broad geographic area. Compare to a LAN (local area network).
Wavelength Division Multiplexing (WDM)
The Wavelength Division Multiplexing passive technology is based on optical multiplexing of different wavelengths in the same fiber. Thanks to optical transmission these different wavelengths do not impact each other and provide a secure, stable and passive transmission. The Basic WDM multiplexing is done by Bidi SFP/SFP+ of 2 wavelengths as 1310nm from A to Z and 1550nm from Z to A over a single Bidirectional fiber. FTTH uses the wavelengths 1310, 1490, 1550nm to support Internet and RF signal. Simple transmission or with two or three colors uses a +/- 50nm band of signal.
Weighted Round Robin (WRR)
A scheduling algorithm in which the highest priority packets take up the largest percentage of time of the router as opposed to always being delivered first. Assures that high priority packets will not crowd out low priority packets. Generally implemented by sampling a packet queue for each priority. Compare to Strict Priority.
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