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.
What router are you using? When you say password, do you mean your router login password or your encryption password? Your encryption password is located in the router. Login to your router at 192.168.1.1 , then go to the wireless page, and look near the area where you entered your encryption method. With WEP, you need to enter WEP key 1 into your computer. With WPA and WPA2, you need to enter the key (sometimes called password or passphrase) into your computer. If you have forgotten your router login password, there is no way to recover it. You will need to reset the router to factory defaults.