Glossary

Apache HTTP Server

Apache is a mature, widely deployed open-source web server known for its module system and flexible per-directory .htaccess configuration.

Apache HTTP Server (often just "Apache" or httpd) is one of the oldest and most widely deployed web servers. It serves web content over http and https and has powered a large share of the internet for decades.

Strengths

Modular — features like rewriting, compression, and auth are loadable modules.
.htaccess — per-directory configuration that shared-hosting users can edit without server access, popular with wordpress.
Huge ecosystem and documentation.

Trade-offs

Apache's traditional process/thread-per-connection model can use more memory under heavy concurrency than event-driven servers like nginx or litespeed. A common pattern places Apache behind a reverse-proxy or nginx front end.

Why it matters for hosting

Apache underpins much shared-hosting and many cpanel stacks. Identifying it (often via the Server response header) tells you the configuration model and where to tune caching and gzip-brotli compression.

See also

Nginx Nginx is a high-performance, event-driven web server and reverse proxy prized for handling many concurrent connections with low memory use. LiteSpeed LiteSpeed is a high-performance web server compatible with Apache configs, popular in hosting for its built-in caching and efficiency. PHP PHP is a widely used server-side scripting language that powers WordPress and much of the web, generating dynamic pages on the server. Reverse Proxy A reverse proxy sits in front of web servers, forwarding client requests to them while adding caching, TLS termination, and load balancing.

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