Suppose you have been appointed as the administrator officer in a very secure office of Pakistan, Pakistan Atomic Energy Commission (PAEC). PAEC manages all its data in its private, dedicated and secure servers. Many hackers try to steal the information by hacking into the system. The hacking attempts continue all day. Being an admin officer and in charge of IT control system, you have to secure the system by following security principles.

a) Describe the detail of security principles to follow and the order in which you will apply these principles into IT systems of PAEC.

b) Moreover, for making the network of computers into PAEC, which networking topology you will choose and why. Also draw the diagram of your chosen networking topology.