World Wide Name

What Does World Wide Name Mean?

A World Wide Name (WWN) is a unique identifier assigned by the Institute of Electrical and Electronics Engineers (IEEE) to the manufacturers of network storage products. A manufacturer must include a WWN with all network storage devices.

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WWN is also known as World Wide Identifier (WWID).

Techopedia Explains World Wide Name

A WWN is a number that is hard-coded into network storage devices, such as fiber channels and advanced technology attachments (ATA). To simplify, a WWN is like a MAC address but for network storage devices.

A WWN is primarily implemented in SANs with multiple attached storage devices, which helps system administrators (SA) uniquely categorize and identify storage segments.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.