There is no scientific name for modem.
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.
RJ-45 Ethernet, RJ-11 Modem
The modem and the computer are separate from each other. The modem is what brings Internet into your house, and then an Ethernet cable brings it to your computer or a router. It is not recommended that you shut off the modem.
You can share a USB modem internet to other computers on the network by simply creating a wireless network with the comp where the modem is connected and then connecting the other computers to the network via the wireless network that you created.
An Xbox 360 or other gaming console (too) close to the modem will cause the modem (online) status connection to burn out.
A modem is a serial port interface to a telephone line, allowing you to create dialup connections to other modem equipped computers. Often, a modem card includes a serial port interface, a COM port. The term modem has also become applicable to other interfaces, such as DSL modems and cable modems, though that usage is tenuous in some cases. Modem stands for Modulator/Demodulator.
Ethernet cable is RJ 45. Dial-up modem is RJ 11
yes you can also use like flash if your modem have the place to put a memory card
A modem
Apple Macs and other types of computers can be networked together and can happily share a modem.
RJ11