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edge switch 2/16 service manual Glossary–27
Glossary
hub
(1) In Fibre Channel protocol, a device that connects nodes into a logical loop by using a
physical star topology. (2) In Ethernet, a device used to connect the HAFM server and the
directors it manages.
hyperlink
A predefined link for jumping from one location to another, within the same computer or
network site or even to a location at a completely different physical location. Commonly used
on the world wide web for navigation, reference, and depth where published text will not
suffice.
hypertext transport protocol
HTTP. A simple protocol that allows world wide web pages to be transferred quickly between
web browsers and servers.
Hz
See Hertz.
I
ID
See identifier.
identifier
ID. (1) One or more characters used to identify or name a data element and possibly to indicate
certain properties of that data element (D, T). (2) A sequence of bits or characters that
identifies a program, device, or system to another program, device, or system. See also port
name.
IEEE
See Institute of Electrical and Electronics Engineers.
IML
See initial machine load.
inband management
Management of the director or switch through Fibre Channel. An interface connection to a
port card. Contrast with out-of-band management.
initial machine load
IML. Hardware reset for all installed control processor (CTP) cards on the director or switch.
This reset does not affect other hardware. It is initiated by pushing the IML button on a
director’s or switch’s operating panel.