The nic is a network adaptor modem is a device to communicate with a remote
What is the difference between a data card and an usb modem?
Nothing. They are both modems (MOdulator/DEModulator).
A USB modem plugs into your USB port.A "normal" modem plugs into your RS232 port or your parallel port.
Port speed is how fast the computer talks to the modem. Modem speed is how fast the modem talks across the phone line to the other modem.
efer
yes
a wireless router is needed when internet modem doesn't have wireless capability.
There is a difference if you are using a low quality router. For good routers you will not notice any difference. Usually there is no difference at all.
An internal modem is housed within the main computer. An external modem is on the outside of the computer and connected to the computer with a cable.
Telephone is Cat3 while the cable coming form the modem is Cat5
The cable modem that you got from your service provider is adequate. You might get a little faster service with another modem but it will probably not make much of a difference.