“When Apple first added iCloud-syncing to Photos, it was a nightmare, because Photos would grab every single bit available,” emailed Glenn Fleishman, a Seattle-based author of multiple books about home networking. Legitimate software can also run amok if it’s not coded to play nicely with others. “One of our first customers was having network issues, and he found his PC was connecting to a different proxy every few minutes due to malware,” emailed Jon Hundley, the Austin-based developer of GlassWire, adding that the customer’s antivirus software hadn’t detected the malware.
Specialized network-diagnostic programs such as Little Snitch (Mac, $45 with free trial) and GlassWire (Windows, free to $99 depending on features) can surface more details, although it helps to be somewhat versed in networking jargon. Pay to stay: Should employees working from home pay 'privilege' tax' to support workers who cannot? Gear up: Need an extra PC for working or schooling from home? Here are some solutions