host
bus
adapter
(HBA).
The
interface
card
between
a
server
or
workstation
bus
and
the
Fibre
Channel
network.
hot-pluggable.
A
field
replaceable
unit
(FRU)
that
can
be
removed
or
installed
without
turning
the
system
off.
Also
called
″
hot
swappable.
″
hot
swappable.
See
hot-pluggable
.
HTTP.
See
Hypertext
Transfer
Protocol.
hub.
A
Fibre
Channel
device
that
connects
nodes
into
a
logical
loop
by
using
a
physical
star
topology.
Hubs
will
automatically
recognize
an
active
node
and
insert
the
node
into
the
loop.
A
node
that
fails
or
is
powered
off
is
automatically
removed
from
the
loop.
Hypertext
Transfer
Protocol
(HTTP).
In
the
Internet
suite
of
protocols,
the
protocol
that
is
used
to
transfer
and
display
hypertext
and
XML
documents
on
the
Web.
I
ID.
Identification.
idle.
Continuous
transmission
of
an
ordered
set
over
a
Fibre
Channel
link
when
no
data
is
being
transmitted,
to
keep
the
link
active
and
maintain
bit,
byte,
and
word
synchronization.
in-band.
Transmission
of
management
protocol
over
the
Fibre
Channel.
initiator.
A
server
or
workstation
on
a
Fibre
Channel
network
that
initiates
communications
with
storage
devices.
See
also
target
.
in-order
delivery
(IOD).
A
parameter
that,
when
set,
guarantees
that
frames
are
either
delivered
in
order
or
dropped.
Internet
protocol
(IP).
A
protocol
that
routes
data
through
a
network
or
interconnected
networks.
Internet
Protocol
(IP)
acts
as
an
intermediary
between
the
higher
protocol
layers
and
the
physical
network.
inter-switch
link
(ISL).
A
Fibre
Channel
link
that
connects
two
switches
(a
link
from
the
expansion
port
(E_port)
of
one
switch
to
the
E_port
of
another).
IOD.
See
in-order
delivery
.
IP.
See
internet
protocol
.
ISL.
See
inter-switch
link
.
ISL
Trunking.
A
feature
that
enables
distribution
of
traffic
over
the
combined
bandwidth
of
up
to
four
inter-switch
links
(ISLs)
(between
adjacent
switches),
while
preserving
in-order
delivery.
A
set
of
trunked
ISLs
is
called
a
trunking
group
;
each
port
employed
in
a
trunking
group
is
called
a
trunking
port
.
See
also
master
port
.
isolated
E_port.
An
expansion
port
(E_port)
that
is
online
but
not
operational
between
switches
due
to
overlapping
domain
ID
or
nonidentical
parameters
such
as
error
delay
timeout
values
(E_D_TOVs).
See
also
expansion
port
.
J
JBOD.
Just
a
bunch
of
disks.
K
K28.5.
A
special
10–bit
character
used
to
indicate
the
beginning
of
a
transmission
word
that
performs
fibre
channel
control
and
signaling
functions.
The
first
seven
bits
of
the
character
are
the
comma
pattern.
See
also
comma
.
kernel
flash.
Flash
memory
that
stores
the
bootable
kernel
code
and
is
visible
within
the
memory
space
of
the
processor.
Data
is
stored
as
raw
bits.
key.
A
string
of
data
(usually
a
numeric
value)
shared
between
two
entities
and
used
to
control
a
cryptographic
algorithm.
Usually
selected
from
a
large
pool
of
possible
keys
to
make
unauthorized
identification
of
the
key
difficult.
See
also
key
pair.
key
pair.
In
public
key
cryptography,
a
pair
of
keys
consisting
of
a
public
and
private
key
of
an
entity.
The
public
key
can
be
publicized,
but
the
private
key
must
be
kept
secret.
L
LAN.
See
local
area
network
.
latency.
The
period
of
time
required
to
transmit
a
frame,
from
the
time
it
is
sent
until
it
arrives.
LED.
See
light-emitting
diode
.
light-emitting
diode
(LED).
An
electronic
component
that
gives
off
visible
or
infrared
light
when
electricity
is
passed
through
it.
It
is
used
to
indicate
the
status
of
elements
on
a
switch.
link.
As
applies
to
fibre
channel,
a
physical
connection
between
two
ports,
consisting
of
both
transmit
and
receive
fibers.
See
also
circuit
.
link
services.
A
protocol
for
link-related
services.
LIP.
See
loop
initialization
primitive
.
LM_TOV.
See
loop
master
timeout
value
.
Glossary
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