To verify legitimacy:

: Codes generated through this ecosystem often link to documents where Optical Character Recognition (OCR)

When you purchase a D-Link networking device, such as a camera or router, it typically comes with a Quick Install Card or a sticker on the device itself featuring a QR code. This code is designed to simplify the setup process by directing your smartphone to the correct resources.

Possibly, but .com may also be a different service. Always verify with the original QR code source. The correct original is .cn for cscan .

: If you have the CamScanner app, you can use it to recognize text and QR codes within documents.

Most modern smartphones have built-in scanners within the camera app. and point it at the QR code.