Definition
Infrastructure security encompasses the policies, procedures, and technologies implemented to protect an organization's physical and virtual IT infrastructure. This includes safeguarding hardware, software, networks, data centers, and cloud environments from unauthorized access, damage, or disruption. It involves a layered defense strategy that addresses vulnerabilities at every level of the IT stack. Implementing robust infrastructure security is crucial for maintaining business continuity, protecting sensitive data, and ensuring regulatory compliance. For instance, securing network access points with firewalls and intrusion detection systems prevents malicious actors from entering the network. Unlike application security which focuses on software vulnerabilities, infrastructure security addresses the underlying systems and hardware that applications run on. This concept is fundamental to certifications like CompTIA Security+, CySA+, and the CISSP exam.