Discuss an organization’s need for physical security. What methods, approaches, and models can be used by organizations when designing physical security needs? Lastly, explain how these security measures will safeguard the organization. Reference:  Khelf, R., & G-Z, N. (2018). IPsec/Firewall Security Policy Analysis: A Survey. 2018 International Conference on Signal, Image, Vision and Their Applications (SIVA), 1. Retrieved from https://doi.org/10.1109/SIVA.2018.8660973