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Virtual channel reminds me of the implementation of CDMA (Sprint & Verizon runs on it) taught in another course. For one spectrum on a frequency, different mobile phone users have different (and unique) codes that separate each user's data. I think it's another example of how one physical resource (one spectrum in this case) can be divided into several to maximize efficiency.


This reminds me of an optimization we used when implementing the hw 4 Webserver, where we provided a separate channel for getting low latency requests in and out of the worker nodes without having them blocked by longer running jobs.