TCP
It does. see the tcp video tutorials
Router will use connecting to modem
HTTP works over a TCP connection.HTTP works over a TCP connection.HTTP works over a TCP connection.HTTP works over a TCP connection.
You will need to buy a new modem that is designed for your DSL modem. This is due to the fact that the modem is designed to use the dsl signal opposed to the cable modem.
You should use "netstat":netstat -p TCP
Because you use different modes to access it!
A phone number dedicated to modem use.
Yes, it does.
Aknowlagement
No, TCP/IP is the not the only protocol used in the world, but it is certainly one of the most popular. Older networks may still use IPX/SPX (Novell) which is a competitor to TCP/IP. Mainframes use SNA or LU6.2 protocols which are very different from TCP/IP. Appletalk is also a competitor to TCP/IP.
The modem is what detects communication signals then goes to the device.