EMC Connectrix B Series Hardware Reference Manual page 115

Half Duplex A mode of communication that allows a port to either transmit or
receive frames at any time, but not simultaneously (with the
exception of link control frames, which can be transmitted at any
time).
Hard Address The AL_PA that an NL_Port attempts to acquire during loop
initialization.
HBA Host bus adapter. The interface card between a server or workstation
bus and the Fibre Channel network.
HCPLD High-capacity PLD. Refers to both CPLDs and FPGAs.
Header A Fibre Channel frame has a header and a payload. The header
contains control and addressing information associated with the
frame.
HiPPI High-Performance Parallel Interface. An 800 Mb/s interface normally
used in supercomputer environments.
Hop Count The number of ISLs a frame must traverse to get from its source to its
destination.
Host A computer that accesses storage devices over the fabric. May also be
referred to as a server. See also WTV.
Hot Swappable A hot-swappable component can be replaced under power.
HSSDC High-speed serial data connection. A form factor that allows quick
connections for copper interface.
HSSDC-2 A second-generation HSSDC connector.
HTTP
Hypertext Transfer Protocol. The standard TCP/IP transfer protocol
used on the World Wide Web.
Hub
A Fibre Channel wiring concentrator that collapses a loop topology
into a physical star topology. Nodes are automatically added to the
loop when active and removed when inactive.
Hunt Group A number of N_Ports registered as a single Alias_ID, so the Fabric
can route a word to a port that is free.
HW Hardware.
Connectrix B Series XPath OS AP-7420B Hardware Reference Manual
Glossary
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