Information Systems homework help

Note:-  total of 800 words minimum and not including references and title page & zero plagiarism
Describe the CIA triad and the defense in depth principle? Why are those concepts important when designing your network security strategy? 200 words
What are the steps for an incident response plan? How does network security play into an incident response plan? 200 words
What are some major differences between open source and commercial\closed source software and solutions? Should you consider one over the other? 200 words
What are firewalls? What are VPNs? What are some alternatives to a traditional firewall? What are some alternatives to traditional VPNs? How does the alternatives improve the traditional version of both?
200 words