Network Hacking

This PART introduces TCP/IP to a person with any level of computer skills or computer
background knowledge. My hope in writing this PART is to explain in a simple way some concepts that may be considered difficult. My ambition is to write a note that makes no assumptions and that leads a TCP/IP beginner to an intermediate understanding of TCP/IP.
This note isn't boringly technical; each topic is covered to sufficient depth but not to an EXTREME.
part :1
chapter : origin of Tcp/ip
so let us start:=====>
Q : WHAT IS TCP/IP ? WHY WE NEED IT?
ANS :TCP/IP Transmission Control Protocol/Internet Protocol (TCP/IP) is a set of protocols that enable communication between computers. There was a time when it was not important for computers to communicate with each other. There was no need
for a common protocol. But as computers became networked, the need arose for computers to agree on certain protocols.SO WE NEED IT TO COMMUNICATE TWO COMPUTER SIMPLY .
ORIGIN :
Understanding the roots of the Internet will give you insight into the development of TCP/IP
and many of its rules and standards. If you know why TCP/IP was created and how it evolved,
the TCP/IP protocol suite is easier to understand.
The predecessor of today's Internet was ARPAnet ,but we will not cover to arpanet .because to day is latest tcp/ip.so will cover it but some understanding of it also require
ARPAnet, a supernetwork that was created by the
Advanced Research Projects Agency (ARPA)
The protocol, or language of choice, used on the ARPAnet was called Network Control
Protocol (NCP)-TCP/IP had not yet been developed. As the ARPAnet grew, however, a new
protocol was needed because NCP simply didn't fulfill all the needs of a larger network. The
NCP protocol was similar to a human language that has only a few words. The language
might enable a few people to communicate, but as you include more people who want to talk
about many more subjects, you have to improve the language.so due to limitation a tcp/ip came in origin
The Birth of TCP/IP As stated earlier, the "language" spoken by hosts on the ARPAnet in 1969 was called NCP.
However, NCP had too many limitations and was not robust enough for the supernetwork,
which was beginning to grow out of control. The limitations of NCP and the growth of the
ARPAnet lead to research and development of a new network language.
SO TCP/IP CAME INTO EVOLUTION .
As you will learn in later chapters, TCP is responsible for making sure that the data gets
through to the other host. It keeps track of what is sent and retransmits anything that did not
get through. If any message is too large for one package, TCP splits the message into several
packages and makes sure that they all arrive correctly. After they have arrived, TCP at the
other end puts all the packages back together in the proper order.
==== So Ma fRend this is birth of tcp/ip=======
Actually tcp/ip is set of different protocol for e.g = we can say that there is a person whose name is pappu and he has 14 child . so when outsider person call to thier child ,they will simply use word that [o pappu ke bachey ] pappu'child .such like that there is so many protocol and tcp ,ip is also a partbut when we called this we simply say tcp/ip stack .hope u understand it.