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.
In Network Connections, press and hold (or right-click) the network name, and select Status Wireless Properties. Step 5: Select the Security tab, and select Show characters. The password for the wireless network is displayed in the Network security key field.nter the user name and password to open your routerâs configuration webpage. Most router documentation includes the default user name and password. Step 4: On the configuration webpage, look for a wireless or wireless settings option. Step 5: Look for a security or wireless encryption setting.