firewalls and intrusion detection systems

Both firewalls and intrusion detection systems are used to monitor network traffic and implement network security policies. Research these technologies and determine how they are similar and how they differ. Are both needed? Explain your answer in a short paper.

use double spacing, 12-point Times New Roman font, and one-inch margins. Sources should be cited according to APA citation method (citation should be relevant and current). Page-length requirements:2–4 pages (graduate courses). Make sure you cite if you take a piece of someone’s work, very important and your reference should relate to your writing (don’t cite a reference because it relates to the course and not this very paper) at least 4 current and relevant academic references. No heavy paraphrasing of others work.

please communicate for any clarifications and please read instructions and follow them. Some tutors don't pay attention to instructions at all. Very important

I am not doing try and error here so please do not send a hand shake if you have no ideas or experience with research.