Common Web Hosting Terms Explained
When you start shopping for a web host, the jargon hits fast: VPS, CDN, SSL, cPanel, uptime guarantees. Most of it sounds technical but the concepts underneath are straightforward. This glossary covers the terms you will encounter most, grouped so the basics come first and the performance and security layer comes second. If you want the bigger picture on how the web works at scale, our web hosting statistics page puts it all in context.
Hosting Basics
- Shared hosting - Your website lives on a server alongside hundreds or thousands of other sites. Resources like CPU and memory are shared, which keeps costs low but means a busy neighbour can slow you down. Good starting point for new sites.
- VPS (Virtual Private Server) - One physical server is split into isolated virtual machines. You get a guaranteed slice of resources and root access, so performance is more predictable than shared hosting. A popular upgrade once traffic grows.
- Dedicated hosting - You rent an entire physical server for your site alone. Maximum performance and control, but also the highest cost. Suited to large, high-traffic sites with specific compliance or resource needs.
- Cloud hosting - Your site runs across a network of servers rather than one machine. Resources scale up or down on demand, and you typically pay for what you use. Resilient by design because there is no single point of failure.
- Managed WordPress hosting - A host optimised specifically for WordPress, handling updates, backups, security scans, and caching on your behalf. You focus on content; the host handles the server administration.
- Domain name - The human-readable address people type to reach your site, such as example.com. You register a domain separately from hosting, though many hosts sell both.
- DNS (Domain Name System) - The internet's phone book. When someone types your domain, DNS translates it into the numerical IP address that points to your server.
- Nameservers - The servers that hold your DNS records. When you buy hosting, your provider gives you nameservers to set in your domain registrar's dashboard so traffic routes to the right place.
- cPanel - A popular web-based control panel that lets you manage files, databases, email accounts, and settings without touching the command line. Many shared hosts include it; some use alternatives like Plesk or a custom dashboard.
- FTP / SFTP - File Transfer Protocol (and its secure variant) lets you upload, download, and manage files on your server directly from your computer using a client like FileZilla. SFTP encrypts the connection; prefer it over plain FTP.
Performance & Security
- Bandwidth - The total amount of data transferred between your server and visitors over a given period. A page that is 2 MB in size uses 2 MB of bandwidth each time it loads. Many hosts advertise "unmetered" bandwidth but fair-use policies still apply.
- Storage / Disk space - How much space your files, databases, and email occupy on the server. Text-heavy sites need very little; sites with video or large image libraries need significantly more.
- Uptime - The percentage of time your site is online and reachable. A host promising 99.9% uptime allows roughly 8.7 hours of downtime per year. Look for guarantees of 99.9% or above, backed by a service level agreement.
- SSL certificate - Encrypts data between your visitor's browser and your server, shown as the padlock in the address bar and the https:// prefix. Google uses HTTPS as a ranking signal. Most hosts now include a free SSL certificate via Let's Encrypt.
- CDN (Content Delivery Network) - A global network of servers that stores cached copies of your site's static files. When a visitor loads your site, files are served from whichever CDN node is geographically closest, reducing load times for international visitors.
- Caching - Saving a pre-built version of a page so the server does not have to regenerate it from scratch on every request. Caching dramatically reduces server load and speeds up page delivery. It operates at several levels: browser, server, and CDN.