Layer 7 security refers to protecting the application layer of the OSI model, which handles user interactions, web applications, APIs, and services. Since this layer processes HTTP/S, DNS, SMTP, and other protocols, it is a common target for attacks like SQL injection, cross-site scripting (XSS), DDoS, API abuse, and malware injections. Layer 7 security solutions include Web Application Firewalls (WAFs), API gateways, intrusion detection/prevention systems (IDS/IPS), and behavioral analytics to detect and mitigate threats. Strong authentication (e.g., OAuth, MFA, and token-based access) and encrypted communication (TLS/SSL) further enhance security, ensuring data integrity and preventing unauthorized access at the application level. Learn more: https://en.wikipedia.org/wiki/Layer_7_Security