Web Hosting Glossary

Web hosting comes with its own dense vocabulary, much of it borrowed from networking and systems administration. This web hosting glossary defines the terms that recur across the site in plain language. Each entry links to the full page where it’s explained in depth. If a term appears in an article and you need the short version, this is the page to bookmark.

Web Hosting Glossary: Hosting Types

Web Hosting — The service and infrastructure that stores a website’s files on a server and makes them accessible on the internet. See what web hosting is.

Shared Hosting — An entry-tier hosting type where many accounts run on the same physical server and share its resources. See shared hosting.

VPS (Virtual Private Server) — A hosting type that partitions one physical server into isolated virtual machines, each with dedicated resources. See VPS hosting.

Dedicated Server — An entire physical machine rented or leased to a single customer, with no resource sharing. See dedicated hosting.

Cloud Hosting — A hosting type built on a distributed network of virtual servers rather than a single machine, designed for elasticity and redundancy. See cloud hosting.

Managed Hosting — Any hosting plan where the provider handles server administration — updates, security patching, backups — on the customer’s behalf. See managed hosting.

Reseller Hosting — A hosting type that lets a business purchase server resources in bulk and resell them as individual hosting accounts to its own clients. See reseller hosting.

Colocation — Renting physical rack space in a data center for hardware the customer owns and maintains themselves. See colocation hosting.

Edge Hosting — A hosting model that distributes content and compute across many geographically dispersed locations to minimize latency. See edge hosting.

Performance and Infrastructure Terms

Bandwidth — The volume of data a hosting account is permitted to transfer between the server and visitors in a given period. See what bandwidth is.

Uptime — The percentage of time a server is online and reachable. See what uptime is.

SLA (Service-Level Agreement) — A hosting provider’s contractual promise about uptime and the remedies owed if it isn’t met. See uptime & SLA.

TTFB (Time to First Byte) — The time between a browser’s request and the first byte of the server’s response, a core server-speed metric. See reducing TTFB.

CDN (Content Delivery Network) — A distributed network of servers that caches and serves content from a location close to the visitor. See CDN in hosting.

SSL/TLS — The cryptographic protocols that encrypt traffic between a browser and a server, indicated by HTTPS. See SSL, TLS & HTTPS explained.

Hypervisor — The software layer that creates and manages virtual machines on a physical server, underpinning VPS and cloud hosting. See what a hypervisor is.

Virtualization — The technique of partitioning one physical server into multiple isolated virtual environments. See server virtualization.

Root Access / SSH — Full administrative control over a server, typically accessed via the SSH protocol. See root access & SSH.

Control Panel (cPanel/Plesk) — The web-based interface used to manage a hosting account without command-line access. See hosting control panels.

Web Server — The software (or the physical machine running it) that receives requests and serves website files to visitors. See what a web server is.

Data Center — The physical facility housing the servers that power hosting infrastructure. See what a data center is.

Resource Limits — The CPU, RAM, storage, and inode caps a hosting plan enforces on an account. See hosting resource limits.

Staging Environment — A private copy of a site used to test changes before they go live. See staging environments.

Nginx / Apache — The two most widely used web server software packages, each with different performance and configuration trade-offs. See Apache vs Nginx.

LiteSpeed — A high-performance web server software often used as a faster alternative to Apache. See what LiteSpeed is.

Docker — A containerization platform used to package and deploy applications consistently across hosting environments. See Docker & containers in hosting.

DNS and Domain Name Terms

DNS (Domain Name System) — The system that translates human-readable domain names into the IP addresses servers use to route traffic. See what DNS is.

Nameserver — A server that stores and answers DNS lookups for a domain, pointing it to the correct hosting account. See what a nameserver is.

Domain Name — The human-readable address (like example.com) visitors type to reach a website. See what a domain name is.

Subdomain — A subdivision of a domain name, such as blog.example.com, used to organize or separate sections of a site. See what a subdomain is.

TLD (Top-Level Domain) — The suffix at the end of a domain name, such as .com or .au. See what a TLD is.

IP Address — The unique numerical address that identifies a server on the internet. See what an IP address is.

A Record — A DNS record type that points a domain or subdomain directly to an IP address. See what a DNS A record is.

CNAME Record — A DNS record type that aliases one domain name to another canonical name. See what a CNAME record is.

MX Record — A DNS record type that routes a domain’s email to the correct mail server. See what an MX record is.

Web Hosting Security Terms

WAF (Web Application Firewall) — A security layer that filters and monitors HTTP traffic to block common web attacks before they reach the application. See web application firewall.

DDoS (Distributed Denial-of-Service) — An attack that floods a server with traffic from many sources to overwhelm it and take a site offline. See DDoS protection in hosting.

Backups — Stored copies of a website’s files and database, used to restore the site after data loss, an attack, or a failed update. See hosting backups.

Every definition above links to the full page for that concept. For the practical, decision-focused version of these attributes, see web hosting features. For the taxonomy these types sit within, see types of web hosting.