What is Subnet in Cybersecurity?

Subnetting knowledge is essential for security roles that involve firewall rule writing, network monitoring, or incident investigation. SOC analysts must read CIDR notation in logs to determine which network segment an alert originates from. Security architects design subnet schemes to enforce least-privilege network access.

Cybersecurity professionals who work with Subnet include Security Engineer, Security Architect, SOC Analyst. These roles apply Subnet knowledge within the Networking & Infrastructure domain.