<s>
A	O
modular	O
switch	O
or	O
chassis	O
switch	O
is	O
a	O
type	O
of	O
network	B-Protocol
switch	I-Protocol
which	O
can	O
be	O
configured	O
using	O
field-replaceable	O
units	O
.	O
</s>
<s>
Modular	O
switches	O
also	O
support	O
additional	O
line	O
cards	O
which	O
can	O
provide	O
new	O
functions	O
to	O
the	O
switch	O
that	O
would	O
previously	O
have	O
been	O
unavailable	O
,	O
such	O
as	O
a	O
firewall	B-Application
.	O
</s>
<s>
An	O
example	O
of	O
a	O
modular	B-Architecture
computer	I-Architecture
network	I-Architecture
switch	I-Architecture
is	O
the	O
Cisco	B-Device
Catalyst	I-Device
6500	I-Device
,	O
which	O
can	O
be	O
configured	O
with	O
up	O
to	O
13	O
slots	O
,	O
and	O
supports	O
connections	O
from	O
RJ45	O
to	O
QSFP+	O
.	O
</s>
