Here is an updated diagram based on Babek's comments and those
made during today's phone call. Comments???
+-------------+
| Application |
+-----+-------+
|
o +-----+-------+
\|/ | Spooler |
/ \ +------+------+
End-User |
+-----+ +------+-------+
| GUI | | Print Driver |
+--+--+ +------+-------+
| |
+---+------------+---+
D S | IPP Client |
I E +---------+----------+
R C |
E U
C R --------- Transport -----------
T I
O T |
R Y +--------+----------+
Y | IPP Server |
+--------+----------+
|
+--------+----------+
| Print Service |
+--------+----------+
|
Output Device(s)