Introduction:
Network security is a complicated subject, historically only tackled by well-trained and experienced experts. Initial period of computing, when secured mainframes acted as central hosts and data repositories were accessed only by dumb terminal with limited rights, network security was all but irrefutable. As networks have become geographically more distributed and heterogeneous, however, the risk of their misuse has also increased. As more and more people become “wired”, a large number of people need to understand the basics of security in a networked world. Moreover, Network security is one of the most important part of the computer technology now a days. So now people are more aware about this kind of threat than ever before. They are learning about how to compute the security of a network and fix the common issues in order to have a secure network and trusted internet connection. These are few of the things that you should know very well before you deal with network system because it is save you a big pain later if you don’t know how to use. Some of the things that you can implement are the security principles, mange the security network, how to detect the intrusion in the system, windows and web security and also the most important; police security of network. The best way to prevent intrusion on a network is to read all the policies that show up several times on the system. You are downloading a best item, it doesn’t mean it is security risk free unless you make sure by analyzing it.

Bibliography
Dean, T. (2013). Network+ Guide to Network (6th edition ed.).