<s>
The	O
Cache	B-Protocol
Array	I-Protocol
Routing	I-Protocol
Protocol	I-Protocol
(	O
CARP	O
)	O
is	O
used	O
in	O
load-balancing	O
HTTP	B-Protocol
requests	I-Protocol
across	O
multiple	O
proxy	O
cache	O
servers	O
.	O
</s>
<s>
Implementations	O
include	O
Apache	B-Language
Traffic	I-Language
Server	I-Language
,	O
Squid	B-Protocol
(	O
software	O
)	O
and	O
the	O
Microsoft	B-Application
Internet	I-Application
Security	I-Application
and	I-Application
Acceleration	I-Application
Server	I-Application
as	O
well	O
as	O
F5	O
Networks	O
BIG-IP	O
devices	O
.	O
</s>
