Caching modules like Apache's mod_cache and Nginx's ngx_http_cache_module reduce server load and improve response times by storing frequently accessed content.
Modules like Apache's mod_security and IIS's Dynamic IP Restrictions provide an extra layer of security by blocking malicious requests and limiting potential attack vectors.
Proxy modules in Apache, Nginx, and IIS enable load balancing, distributing traffic across multiple servers to ensure high availability and reliability.
URL rewrite modules in Apache, Nginx, and IIS help create user-friendly URLs that improve search engine rankings and overall user experience.
SSL/TLS modules across all server types ensure encrypted communication between the server and clients, protecting sensitive data.