User`s guide

Glossary 381
WAN Wide Area Network - A network which
encompasses inter-connectivity between devices
over a wide geographic area. A wide area
network may be privately owned or rented, but
the term usually connotes the inclusion of public
(shared) networks.
WDM Wave Division Multiplexing - A technology
that puts data from different sources together on
an optical fiber, with each signal carried on its
own separate light wavelength. Using WDM, up
to 80 (and theoretically more) separate
wavelengths or channels of data can be
multiplexed into a stream of light transmitted on a
single optical fiber.
WEBM Web-Based Enterprise Management - A
consortium working on the development of a
series of standards to enable active management
and monitoring of network-based elements.
Zoning In Fibre Channel environments, the
grouping together of multiple ports to form a
virtual private storage network. Ports that are
members of a group or zone can communicate
with each other but are isolated from ports in
other zones.