If you can use something, it's useful. Useful things are handy for whatever you're doing. If something is just what you need or you just find it helpful, then it's useful. A hammer is useful in building many things. Coasters are useful if you don't want a coffee table to get stains. College degrees are useful â or necessary â for many careers.
Where is the security key on a comcast modem located? The security key on a Comcast Modem is located next to the serial  number of the unit. Sometimes the serial number is the number used  as a security code if it is not printeâ¦d on the device. (MORE) 1 person found this useful.
Locate WPA2 or WPA Security Key. 1  Open your Web browser and enter http://192.168.1.1 in the Address field. 2  Enter your user name. 3  Enter your password. 4  If you've forgotten your user name or password, you must reset your router to the factory defaults to access the configuration screen. 5  Click the Wireless Settings icon. 6  Click Wireless Status in the ... Enter your password. 2  If you've forgotten your user name or password, you must reset your router to the factory defaults to access the configuration screen. 3  Click the Wireless Settings icon. [ 4 Show Me]. 5  Click Wireless Status in the left navigation panel.