https://en.wikipedia.org/wiki/Topography data centers (where? how many?) https://en.wikipedia.org/wiki/Internet_infrastructure cellular data towers terrestrial fiber optic telephone poles https://en.wikipedia.org/wiki/Internet_exchange_point subsea cables https://www.reddit.com/r/ITCareerQuestions/comments/12r5ttw/how_does_internet_infrastructure_work_around_the/ https://en.wikipedia.org/wiki/Internet_backbone https://en.wikipedia.org/wiki/Network_topology https://autonomy.work/portfolio/the-actually-existing-internet-network-topology/