RJ-45 Ethernet, RJ-11 Modem
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.
If your laptop has a LAN port, good. If not, you can get a PCMCIA card for LAN for around $10 on eBay. Then, connect your laptop LAN port to your desktop LAN port with a Crossover ethernet cable. Make sure you specify you need a crossover cable at the computer store, they are different from the normal ethernet cables found in most stores. Now dialup to the internet with your desktop. Now you need to go to your dialup connections. In Windows XP, you can do this by going to Start>Connect To>All ConnectionsIt will be different in other versions of windows.Right click on your dialup connection and choose properties. Somewhere in the properties there should be an option to share the dialup connection. Do this. At this point, your laptop should have internet.Good luck!
Ethernet cable is RJ 45. Dial-up modem is RJ 11
RJ11
Very few modern computers have modems, due to the falling popularity of dialup modems. DSL and Cable modems are extremely rare as internal devices due to limited useability and the inability to network more than one computer or device to such a computer with ease. If it has a dialup modem, there will be a port for a phone cord in it.
RJ 11
The port speed setting for a modem, controls the speed that the computer communicates with its modem.
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.
If you mean can you network computer to computer through a phone line, adhock, then if both computers have a dial up modem then yes. It's kind of a pain tho, and not every modem could do it. If you mean connect to another computer via internet over a phone line then yes if it has a dial up modem. DSL does use the phone line for access to the DSL modem.
Yes, this will connect a computer to a second port on your modem/router
If your not using it then don't worry about it. But motherboards don't come with a modem port. A modem port is on an add on card like a PCI Modem. Take out the old one and insert another and load the drivers from the included CD that is the cheapest way.