A PoP (point of presence) is a physical site - a data center or interconnection facility - where a CDN places edge servers near concentrations of viewers. The global mesh of PoPs is what lets a CDN serve content with low latency everywhere: a viewer is routed to a nearby PoP rather than a distant origin.
PoP density and placement (and good peering with local ISPs) directly determine performance in a region. When evaluating CDNs for global delivery, the map of PoPs and their connectivity in your key markets matters as much as headline price, because a sparse footprint in a target region means worse QoE there no matter how cheap the bytes are.
The handbook · 7 volumes
Fora Soft Video Engineering Handbook
A PoP's distance from viewers sets the round-trip time for every segment, so CDN coverage in your audience's regions matters more than total PoP count. We wrote seven volumes covering the video stack; for PoPs start with Volume 3 on CDNs and caching, then Volume 2 on network transport and QUIC, with encoding in Volume 1. Written by Nikolay Sapunov, CEO at Fora Soft.
Viewers in some regions getting slow starts and stalls?
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