What the different between Intrusion Detection Systems and Intrusion prevention Systems?

An Assignment with 4 questions

Requirements:

Question One

What the different between Intrusion Detection Systems and Intrusion prevention Systems?

Question Two

According to NIST, explain is what the systems development lifecycle (SDLC)? List with brief explanation each phase of the SDLC?

Question Three

What is the difference between a Denial of Service (DoS) attack, malware, and an information security incident, and how can these threats potentially harm a business or its operations?

Question Four

Describe the core elements of a resilient organization and explain how they contribute to its ability to adapt and recover from known or unknown environmental changes.