Challenge
Handshake
Authentication
Protocol
(CHAP).
(1)
An
authentication
protocol
that
protects
against
eavesdropping
by
encrypting
the
user
name
and
password.
(2)
Allows
remote
servers
and
clients
to
securely
exchange
authentication
credentials.
chassis.
The
metal
frame
in
which
the
switch
and
switch
components
are
mounted.
CIM.
See
Common
Information
Model
circuit.
An
established
communication
path
between
two
ports.
Consists
of
two
virtual
circuits
capable
of
transmitting
in
opposite
directions.
See
also
link
.
class
1
service.
The
class
of
frame-switching
service
for
a
dedicated
connection
between
two
communicating
ports
(also
called
″
connection-oriented
service
″
).
Includes
acknowledgement
of
frame
delivery
or
nondelivery.
class
2
service.
A
connectionless
class
of
frame-switching
service
that
includes
acknowledgement
of
frame
delivery
or
nondelivery.
class
3
service.
A
connectionless
class
of
frame-switching
service
that
does
not
include
acknowledgement
of
frame
delivery
or
nondelivery.
Can
be
used
to
provide
a
multicast
connection
between
the
frame
originator
and
recipients,
with
acknowledgement
of
frame
delivery
or
nondelivery.
class
4
service.
A
connection-oriented
service
that
allows
fractional
parts
of
the
bandwidth
to
be
used
in
a
virtual
circuit.
class
6
service.
A
connection-oriented
multicast
service
geared
toward
video
broadcasts
between
a
central
server
and
clients.
class
F
service.
The
class
of
frame-switching
service
for
a
direct
connection
between
two
switches,
allowing
communication
of
control
traffic
between
the
E_Ports.
Includes
acknowledgement
of
data
delivery
or
nondelivery.
class
of
service.
A
specified
set
of
delivery
characteristics
and
attributes
for
frame
delivery.
CLI.
See
command
line
interface
.
client.
A
system
or
process
that
is
dependent
on
another
system
or
process
(usually
called
the
server)
to
provide
it
with
access
to
data,
services,
programs,
or
resources.
comma.
A
unique
pattern
(either
1100000
or
0011111)
used
in
8b/10b
encoding
to
specify
character
alignment
within
a
data
stream.
command
line
interface
(CLI).
Interface
that
depends
entirely
on
the
use
of
commands,
such
as
through
Telnet
or
simple
network
management
protocol
(SNMP),
and
does
not
involve
a
graphical
user
interface.
Common
Information
Model
(CIM).
An
implementation-neutral,
object-oriented
schema
for
describing
network
management
information.
The
Distributed
Management
Task
Force
(DMTF)
develops
and
maintains
CIM
specifications.
community
(SNMP).
A
relationship
between
a
simple
network
management
protocol
(SNMP)
agent
and
a
set
of
SNMP
managers
that
defines
authentication,
access
control,
and
proxy
characteristics.
compact
flash.
Flash
(temporary)
memory
that
is
used
in
a
manner
similar
to
hard
disk
storage.
It
is
connected
to
a
bridging
component
that
connects
to
the
PCI
bus
of
the
processor.
Not
visible
within
the
processor’s
memory
space.
control
processor
(CP).
The
central
processing
unit
that
provides
all
control
and
management
functions
in
a
switch.
control
processor
card
(CP
card).
The
central
processing
unit
of
the
director/switch,
which
contains
two
control
processor
(CP)
card
slots
to
provide
redundancy.
Provides
Ethernet,
serial,
and
modem
ports
with
the
corresponding
light-emitting
diodes
(LEDs).
CP.
See
control
processor
.
CP
card.
See
control
processor
card
.
CPU.
See
central
processing
unit
.
credit.
When
applied
to
a
switch,
the
maximum
number
of
receive
buffers
provided
by
a
fabric
port
(F_port)
or
fabric
loop
port
(FL_port)
to
its
attached
node
port
(N_port)
or
node
loop
port
(NL_port),
respectively,
such
that
the
N_port
or
NL_port
can
transmit
frames
without
over-running
the
F_port
or
FL_port.
CRU.
See
customer
replaceable
unit
CSA.
Canadian
Standards
Association.
customer
replaceable
unit
(CRU).
An
assembly
that
is
replaced
in
its
entirety
by
a
customer
when
any
one
of
its
components
fails.
In
contrast,
a
field
replaceable
unit
(FRU)
can
only
be
replaced
by
a
qualified
service
representative.
cut-through.
A
switching
technique
that
allows
the
route
for
a
frame
to
be
selected
as
soon
as
the
destination
address
is
received.
See
also
route
.
D
data
rate.
The
rate
at
which
data
is
transmitted
or
received
from
a
device.
Interactive
applications
tend
to
require
a
high
data
rate,
while
batch
applications
can
usually
tolerate
lower
data
rates.
Glossary
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