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.
jtb03 wrote:The DNS settings on the Cable Modem are set by Comcast, but are only used for management of the Cable Modem. You can specify different DNS servers on your PC or Wireless gateway and that will override what is set via DHCP.The DNS settings on the Cable Modem are set by Comcast, but are only used for management of the Cable Modem.tb03 wrote:The DNS settings on the Cable Modem are set by Comcast, but are only used for management of the Cable Modem. You can specify different DNS servers on your PC or Wireless gateway and that will override what is set via DHCP.