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.
Start by logging into the router by going to http://192.168.1.1. The default username and password are both admin. You should come across page similar to this: If you click on the picture of the router in the middle, you will get the wireless options on the right hand side of the page. Give your wireless network a name, set the Authentication Method to WPA2, enter a password, and hit apply (the router will reboot).