Netflix calling out US ISPs

[rh71]

How does an ISP throttle a particular service that we request via http? Never really understood.

 

[ImpulsE69]

Various ways. Packet inspection, file types, point of origin, etc. I doubt they do it much by ports because those can change pretty quickly.

 

[TerryMathews]

How does an ISP throttle a particular service that we request via http? Never really understood.

Simplest way would be via domain name. Most foolproof and complicated would be DPI.