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.
3) Leave the User Name box blank. Type admin in the Password box, then click on OK, or press the Enter key on the keyboard. 1) Click on the Administration tab when the Linksys Wireless Router Setup page appears. 2) Type the password you want in the Password: box next to Local Router Access. 3) Click on Save Settings. 4) Be sure you remember or write down this password and the encryption password in step #13 below.