What is Network security ? and data science ?

Question

It's a question on network security and data science defination !

Answer 1

You can learn data Science here

Google search Network Security

https://www.sololearn.com/Course/data-science/?ref=app

Answer 2

Google provides definitions

Answer 3

For "what is ***" type of questions, you better get yourself a little bit of research. Those two you asked for are far too broad for a discussion topic in forum like this.