How to make lan between two home Computers

Take a crosss cable.A cross cable has 2 connectors on both sides.connect one with the Computer A and other with the computer B.NOW assign the Ip adress by going into My Network Places.Go to my network connections .you will see a network connection.click it go to properties then go to TCP/IP Assign IP Address: 10.1.1.1
Subnet mask: 255.255.255.0
Gateway: null
DNS Servers:null
press ok.
Now come to computer B.Go to my network places go the connection properties go to TCP/IP Assign the following address
IP Address: 10.1.1.2javascript:void(0)
Subnet mask: 255.255.255.0
Gateway: null
DNS Servers:null
press ok.
1 now go to Start
2 click Run

3 write cmd(A command prompt will open)

4 write ping 10.1.1.2 from the computer A or 10.1.1.1 from the computer B
if the connection is successful it will show reply reply from (IP).
If connection is not established it will show request time out.
Share files from PC A to PC B and enjoy.

What is a cable modem:

It is is a type of network bridge(data forwarding) and modem that provides bi-directional data communication via radio frequency channels on a cable television (CATV) infrastructure. Cable modems are mostly used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a cable television networks

What a modem do:

Modem converts analog signal into digital and vice versa.Its function is modulation and demodulation of data.

what is a network:

The connectivity of two or more devices so that they can communicate with each other.

OSI reference model:

It is the model to under stand network.It is layered application to understand how your data moves from one machine to another.
Osi model overview:
7:Application(Reduces complexity)
6:Presentation(Standardizes interfaces)
5:Session(Facilitates modular engineering)
4:Transport(transport of data)
3:Network(include routers and switches)
2:datalink (switches)
1:Physical(end devices)