McDATA Enterprise Operating System, User Manual

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Glossary g-17
Glossary
uniform resource
locator
URL. A URL is the address of a document or other resource on the
Internet.
universal port module A flexible 1 gigabit-per-second or 2 gigabit-per-second module that
contains four generic ports (G_Ports).
URL See uniform resource locator .
user datagram
protocol
UDP. A connectionless protocol that runs on top of Internet protocol
(IP) networks. User datagram protocol/Internet protocol (UDP/IP)
offers very few error recovery services, instead providing a direct
way to send and receive datagrams over an IP network. UDP/IP is
primarily used for broadcasting messages over an entire network.
W
warning message A message that indicates a possible error has been detected. See also
error message ; information message .
World Wide Names WWN. Eight-byte string that uniquely identifies a Fibre Channel
entity (that is, a port, a node, a switch, a fabric), even on global
networks.
WWN See World Wide Names .
Z
zone Set of devices that can access one another. All connected devices may
be configured into one or more zones. Devices in the same zone can
see each other. Those devices that occupy different zones cannot.
See
also active zone set ; zone set ; zoning .
zone member Specification of a device to be included in a zone. A zone member can
be identified by the port number of the director or switch to which it
is attached or by its port World Wide Name (WWN). In multiswitch
fabrics, identification of end-devices or nodes by WWN is preferable.
zone set A collection of zones that may be activated as a unit. See also active
zone set ; zone .