Should two-factor authentication let me verify via a single device?

A reader wonders if something's wrong, because Apple's second-factor system lets him approve a connection from a seemingly odd place.

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Glenn Fleishman is the author of dozens of books. His most recent, updated for iOS 14, iPadOS 14, and Big Sur, are Take Control of iOS and iPadOS Privacy and Security, Take Control of Your Apple ID, Second Edition, and Take Control of Wireless Networking and Security. He’s a senior contributor to Macworld, where he writes Mac 911.
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