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.
Where can I find the Wireless Network Name (SSID) and Wireless Security Key/Password for the Motorola Gateway? The Wireless Network Name (SSID) and Wireless Security Key/Password of your cable modem router are printed on the bottom label. See below for examples of where to find the information. (Please note the MB7220 and MB7420 do not have wireless capability.