Web Hosting

A web hosting service is a type of Internet hosting service that allows individuals and organizations to make their own website accessible via the World Wide Web.
In large companies who are not internet service providers also need a computer permanently connected to the web so they can send email, files, etc. to other sites. They may also use the computer as a website host so they can provide details of their goods and services to anyone interested.

Categories Of Web Hostings

Free web hosting service
Shared web hosting service
Reseller web hosting
Virtual Dedicated Server
Dedicated hosting service
Managed hosting service
Colocation web hosting service

Cloud Hosting: is a new type of hosting platform that allows customers powerful, scalable and reliable hosting based on clustered load-balanced servers and utility billing.

Grid hosting: this form of distributed hosting is when a server cluster acts like a grid and is composed of multiple nodes.

Domain

1.Domain Name System (DNS), an hierarchical naming system for computers or any resource connected to the Internet.
2.Domain model, a conceptual model of a system that describes the various entities involved and their relationships
3.Domain name registrar, an organization that manages the reservation of Internet domain names in one or more domains.

Web Site

A web site is a collection of related web pages, images, videos or other digital assets that are addressed relative to a common Uniform Resource locator (URL), often consisting of only the domain name, or the IP address, and the root path ('/') in an Internet Protocol-based network.

A web page is a document, typically written in plain text interspersed with formatting instructions of Hypertext Markup Language (HTML,XHTML).