<s>
Cisco	B-General_Concept
Centralized	I-General_Concept
Key	I-General_Concept
Management	I-General_Concept
(	O
CCKM	B-General_Concept
)	O
is	O
a	O
form	O
of	O
Fast	O
Roaming	O
and	O
a	O
subset	O
of	O
the	O
Cisco	B-Protocol
Compatible	I-Protocol
EXtensions	I-Protocol
(	O
CCX	O
)	O
specification	O
.	O
</s>
<s>
When	O
a	O
wireless	B-Architecture
LAN	I-Architecture
is	O
configured	O
for	O
fast	O
reconnection	O
,	O
a	O
Lightweight	B-Protocol
Extensible	I-Protocol
Authentication	I-Protocol
Protocol	I-Protocol
(	O
LEAP	B-Protocol
)	O
enabled	O
client	B-Protocol
device	O
can	O
roam	O
from	O
one	O
wireless	B-Device
access	I-Device
point	I-Device
to	O
another	O
without	O
involving	O
the	O
main	O
server	B-Application
.	O
</s>
<s>
Using	O
CCKM	B-General_Concept
,	O
an	O
access	O
point	O
configured	O
to	O
provide	O
Wireless	O
Domain	O
Services	O
(	O
WDS	O
)	O
takes	O
the	O
place	O
of	O
the	O
RADIUS	B-Protocol
server	I-Protocol
,	O
and	O
authenticates	O
the	O
client	B-Protocol
without	O
perceptible	O
delay	O
in	O
voice	O
or	O
other	O
time-sensitive	O
applications	O
.	O
</s>
<s>
The	O
user	O
must	O
authenticate	O
with	O
the	O
Radius	B-Protocol
server	I-Protocol
the	O
first	O
time	O
–	O
then	O
he	O
can	O
roam	O
between	O
access	O
points	O
using	O
cached	O
credentials	O
.	O
</s>
<s>
This	O
saves	O
time	O
in	O
the	O
roaming	O
process	O
,	O
especially	O
valuable	O
for	O
VoIP	B-Application
devices	O
.	O
</s>
<s>
The	O
current	O
implementation	O
of	O
CCKM	B-General_Concept
requires	O
Cisco	O
compatible	O
hardware	O
and	O
either	O
LEAP	B-Protocol
,	O
EAP-FAST	O
(	O
CCXv3	O
)	O
or	O
PEAP-GTC	O
,	O
PEAP-MSCHAP	O
,	O
EAP-TLS	O
(	O
CCXv4	O
)	O
.	O
</s>
