Technology Review

In addition to the increase in traffic, sheltering in place strains the internet in two more ways. First, last-mile connections—the ones that run from local exchanges or data centers to your home—are typically the weakest links in a network. Many run over outdated cables. When broadband was rolled out in the US, for example, it often piggybacked on cables originally installed for TV. These cables were designed to pipe data into a home and not out of it, which is why uploading video from a home internet connection can be flaky.