You can find a more detailed (yet accessible) description of TCP congestion avoidance and slow start in this excellent and free book: https://hpbn.co/building-b

You can find a more detailed (yet accessible) description of TCP congestion avoidance and slow start in this excellent and free book: https://hpbn.co/building-blocks-of-tcp/#congestion-avoidance-and-control https://hpbn.co/building-blocks-of-tcp/#congestion-avoidance... Edit: also, it has an entire section about HTTP/2 https://hpbn.co/http2/ https://hpbn.co/http2/