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.
(default log in settings for most routers are: Username: Admin :Password: Admin When you are logged into the router, go to the Wireless tab on the left side, then click on Wireless security. Depending on with security settings you have enabled, (WEP, WPA(2), WPA-PSK) you can chance your WiFi password.default log in settings for most routers are: Username: Admin :Password: Admin When you are logged into the router, go to the Wireless tab on the left side, then click on Wireless security. Depending on with security settings you have enabled, (WEP, WPA(2), WPA-PSK) you can chance your WiFi password.