Network Security Fundamentals Questions

Foundational principles and practices for protecting networked infrastructure. Topics include how perimeter defenses such as firewalls operate, designing firewall rules and access control lists to control inbound and outbound traffic by port and protocol, network segmentation and isolation to reduce blast radius, access control using security groups and policy based filters, deployment and operation of intrusion detection and intrusion prevention systems, basics of the zero trust architectural approach where each request is authenticated and authorized, secure remote access considerations, and how network security integrates with monitoring and incident response. Candidates may be evaluated on rule design tradeoffs, troubleshooting blocked traffic, and explaining how security controls impact availability and performance.