25-01 Defense in Depth
# The 7 Layers of Security
# 1. Data
access to business and customer data, and encryption to protect data.
# 2. Application
applications are secure and free of security vulnerabilities.
# 3. Compute
Access to virtual machines (ports, on-premise, cloud)
# 4. Network
limit communication between resources using segmentation and access controls.
# 5. Perimeter
distributed denial of service (DDoS) protection to filter large-scale attacks before they can cause a denial of service for users.
# 6. Identity and access
controlling access to infrastructure and change control.
# 7. Physical
limiting access to a data center to only authorized personnel.