<s>
A	O
deployment	B-Language
diagram	I-Language
in	O
the	O
Unified	B-Language
Modeling	I-Language
Language	I-Language
models	O
the	O
physical	O
deployment	O
of	O
artifacts	B-Language
on	O
nodes	B-Language
.	O
</s>
<s>
To	O
describe	O
a	O
web	O
site	O
,	O
for	O
example	O
,	O
a	O
deployment	B-Language
diagram	I-Language
would	O
show	O
what	O
hardware	O
components	O
(	O
"	O
nodes	B-Language
"	O
)	O
exist	O
(	O
e.g.	O
,	O
a	O
web	B-Application
server	I-Application
,	O
an	O
application	B-Application
server	I-Application
,	O
and	O
a	O
database	B-Application
server	I-Application
)	O
,	O
what	O
software	O
components	O
(	O
"	O
artifacts	B-Language
"	O
)	O
run	O
on	O
each	O
node	O
(	O
e.g.	O
,	O
web	B-Application
application	I-Application
,	O
database	O
)	O
,	O
and	O
how	O
the	O
different	O
pieces	O
are	O
connected	O
(	O
e.g.	O
</s>
<s>
JDBC	B-Language
,	O
REST	O
,	O
RMI	B-Operating_System
)	O
.	O
</s>
<s>
The	O
nodes	B-Language
appear	O
as	O
boxes	O
,	O
and	O
the	O
artifacts	B-Language
allocated	O
to	O
each	O
node	O
appear	O
as	O
rectangles	O
within	O
the	O
boxes	O
.	O
</s>
<s>
Nodes	B-Language
may	O
have	O
subnodes	O
,	O
which	O
appear	O
as	O
nested	O
boxes	O
.	O
</s>
<s>
A	O
single	O
node	O
in	O
a	O
deployment	B-Language
diagram	I-Language
may	O
conceptually	O
represent	O
multiple	O
physical	O
nodes	B-Language
,	O
such	O
as	O
a	O
cluster	O
of	O
database	B-Application
servers	I-Application
.	O
</s>
<s>
There	O
are	O
two	O
types	O
of	O
Nodes	B-Language
:	O
</s>
<s>
Device	O
nodes	B-Language
are	O
physical	O
computing	O
resources	O
with	O
processing	O
memory	O
and	O
services	O
to	O
execute	O
software	O
,	O
such	O
as	O
typical	O
computers	O
or	O
mobile	O
phones	O
.	O
</s>
