Conduct Research on Network Security, present detailed information addressing the following items in one to two pages: What is the main goal in a Denial of Service (DoS) attack? How do DDoS and DRDoS attacks differ? What is the difference between a virus and a worm? What is social engineering? What is the best defense against social engineering? What are some examples of physical security measures you can implement to protect your network? In addition to implementing virus scanning software, what must you do to ensure that you are protected from the latest virus variations?