A company issues locked-down smartphones to field technicians. On the Android handsets, administrators disable the Install unknown apps (formerly Unknown sources) option so workers cannot download software directly from websites or email attachments. The same restriction is not required on the company's managed iPhones. Which Android characteristic makes this additional control necessary?
Android supports sideloading apps from outside the official store whenever the user enables the Install unknown apps/Unknown sources setting.
Android removes all code-signing requirements, allowing any APK to run without verification once the phone is powered on.
Android forces applications to be installed only through the ADB command-line tool, making store-based installation impossible.
Android encrypts application packages with carrier-controlled DRM, so disabling the setting is needed only to allow updates from Google Play.
Android permits users to sideload applications-packages in APK format-from any source once the Install unknown apps/Unknown sources toggle is enabled. This design gives users a direct path to install software outside Google Play, so administrators must explicitly block the setting to keep only vetted apps on the device. iOS, in contrast, accepts software solely from the App Store or a supervised Mobile Device Management (MDM) channel, so sideloading is not natively available. The other options are incorrect because Android still enforces certificate signing, does not require ADB for normal installs, and does not encrypt APKs with carrier-controlled DRM.
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