A push notification can seem almost instantaneous. Someone sends a message, a sports score changes, a delivery status updates, or a security alert is triggered, and a few moments later a notification appears on a phone whose app may not even be open. It can feel as though the app itself is permanently listening for … Read more
When a phone loses its internet connection, some apps appear to stop immediately while others continue working almost normally. A notes app may let you write, edit and search existing documents. A music app may continue playing downloaded tracks. A navigation app may still show a map and calculate a route. Meanwhile, a social media … Read more
Typing a web address into a browser looks like one action: enter a URL, press Enter, and wait for the page. Underneath that simple interaction, however, the browser has to solve several different problems before it can display useful content. It has to interpret the URL, determine where the requested website is located, establish a … Read more
A speed test can say 500 Mbps while a large file appears to download at 35 MB/s. Another test may report 700 Mbps, while a download from a particular website barely reaches 20 MB/s. At first glance, these numbers seem contradictory. Usually, they aren’t. The underlying problem is that “internet speed” is not a single … Read more
A software update can appear to be a few gigabytes while the device asks for considerably more free storage before installation. The difference comes from the fact that downloading an update and installing it are separate operations. The device may need room for the compressed download, extracted files, temporary installation data, updated components and information … Read more
An SSD can continue working when it is nearly full, but the way it handles new data can change as available space gets tighter. The reason is not simply that the drive has fewer gigabytes left for your files. NAND flash has specific rules for writing and erasing data, and the SSD controller needs room … Read more
When a phone or laptop sees several Wi-Fi networks, it does not simply connect to whichever signal appears strongest. The decision is made by the client device using information about available access points, signal conditions, previously joined networks, security settings and, in some cases, information supplied by the Wi-Fi infrastructure. The exact decision process varies … Read more