<s>
IOS	B-Device
XE	I-Device
is	O
a	O
release	O
train	O
of	O
Cisco	O
Systems	O
 '	O
widely	O
deployed	O
Internetworking	B-Protocol
Operating	I-Protocol
System	I-Protocol
(	O
IOS	B-Protocol
)	O
,	O
introduced	O
with	O
the	O
ASR	B-Protocol
1000	I-Protocol
series	O
.	O
</s>
<s>
It	O
is	O
built	O
on	O
Linux	B-Operating_System
and	O
provides	O
a	O
distributed	O
software	O
architecture	O
that	O
moves	O
many	O
operating	O
system	O
responsibilities	O
out	O
of	O
the	O
IOS	B-Protocol
process	O
and	O
has	O
a	O
copy	O
of	O
IOS	B-Protocol
running	O
as	O
a	O
separate	O
process	O
.	O
</s>
<s>
Since	O
it	O
runs	O
a	O
copy	O
of	O
IOS	B-Protocol
,	O
all	O
CLI	B-Application
commands	O
are	O
the	O
same	O
between	O
Cisco	B-Protocol
IOS	I-Protocol
and	O
IOS	B-Device
XE	I-Device
,	O
in	O
contrast	O
to	O
IOS	B-Device
XR	I-Device
,	O
which	O
has	O
a	O
completely	O
different	O
code	O
base	O
and	O
whose	O
developers	O
implemented	O
a	O
different	O
CLI	B-Application
command	O
set	O
.	O
</s>
<s>
IOS	B-Device
XE	I-Device
is	O
released	O
separately	O
for	O
ASR	B-Protocol
1000	I-Protocol
and	O
Catalyst	B-Device
3850	O
.	O
</s>
<s>
Cisco	B-Protocol
IOS	I-Protocol
is	O
a	O
monolithic	O
operating	O
system	O
running	O
directly	O
on	O
the	O
hardware	O
while	O
IOS	B-Device
XE	I-Device
is	O
a	O
combination	O
of	O
a	O
Linux	B-Operating_System
kernel	I-Operating_System
and	O
a	O
monolithic	O
application	O
(	O
IOSd	O
)	O
that	O
runs	O
on	O
top	O
of	O
this	O
kernel	B-Operating_System
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
IOS	B-Device
XR	I-Device
is	O
based	O
on	O
QNX	B-Operating_System
(	O
since	O
version	O
5.0	O
it	O
's	O
also	O
based	O
on	O
linux	B-Operating_System
)	O
,	O
where	O
the	O
IOSd	O
application	O
has	O
been	O
separated	O
into	O
many	O
different	O
applications	O
.	O
</s>
<s>
While	O
IOS	B-Device
XE	I-Device
(	O
IOSd	O
)	O
and	O
IOS	B-Protocol
share	O
a	O
lot	O
of	O
the	O
same	O
code	O
,	O
IOS	B-Device
XR	I-Device
is	O
a	O
completely	O
different	O
code	O
base	O
.	O
</s>
<s>
Since	O
IOS	B-Device
XE	I-Device
has	O
IOSd	O
running	O
as	O
an	O
application	O
on	O
top	O
of	O
Linux	B-Operating_System
,	O
it	O
becomes	O
possible	O
to	O
also	O
run	O
different	O
applications	O
on	O
the	O
hardware	O
,	O
a	O
good	O
example	O
of	O
this	O
is	O
running	O
Wireshark	O
on	O
a	O
switch	O
.	O
</s>
<s>
Another	O
example	O
is	O
the	O
Cisco	B-Device
IOS	I-Device
XE	I-Device
Open	O
Service	O
Containers	O
.	O
</s>
