[Skunkworks] of MTUs, Vlans and rate limiting.......101

@Net Net, @John Doe.... Guys, wondering on the VLANS and rate limiting first, before we go down MTUs? Ok, I've been out of touch with dist networks for a long while, so am catching up on the technologies in deployment locally. Wimax, Fiber. I assume that they are all using VLANS for circuits and rate limiting applied to set circuit throughputs, am I correct in thinking this? In case of point-point and point to multi-point? And is rate limiting still used to set some part of SLAs? Or have the entire industry headed towards wi-fi broadband concept? Rgds.