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WWW2 and WWW3 are hostnames or subdomains, typically used to identify a series of closely related websites within a domain, such as www.example.com, www2.example.com, and www3.example.com; the series may be continued with additional numbers: WWW4, WWW5, WWW6 etc. Traditionally, such websites are mirrors used for server load balancing.
- Subdomain, part of a domain name identifying a website
- W3 (disambiguation)
- World Wide Web, a system of interlinked, hypertext documents that runs over the Internet
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