Physical security

 please write 400-600 words on the following questions?

1. What was the name of the first computer network?
   1. Who created this network
2. When did this network got established?
   1. Explain one of the major disadvantages of this network at its initial stage
3. What is TCP?
   1. Who created TCP?
   2. When did it got implemented
4. What is IP?
   1. When did it got implemented
5. How did the implementation of TCP/IP revolutionize communication technology?

Requirements:

You must write a minimum of three paragraphs, with three different citations, and every paragraph should have at least four complete sentences for each question.