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BSD 4.3reno

.PS
.ps 20
	boxht = .754; boxwid = 1.75
## figure 2
UPRG:	box
	move from UPRG.w up .015
	line invisible right 1.75 "{USER}" " "
	move from UPRG.w down .015
	line invisible right 1.75 " " "{PROGRAMS}"
APP:	box with .n at UPRG.s
	move from APP.w up .015
	line invisible right 1.75 "{LAYER 7}" " "
	move from APP.w down .015
	line invisible right 1.75 " " "{APPLICATION}"
PRES:	box with .n at APP.s
	move from PRES.w up .015
	line invisible right 1.75 "{LAYER 6}" " "
	move from PRES.w down .015
	line invisible right 1.75 " " "{PRESENTATION}"
SESS:	box with .n at PRES.s
	move from SESS.w up .015
	line invisible right 1.75 "{LAYER 5}" " "
	move from SESS.w down .015
	line invisible right 1.75 " " "{SESSION}"
TRANS:	box with .n at SESS.s
	box shaded with .nw at TRANS.nw ht .24 width 1.25
	move from TRANS.nw down .225
	line invisible right 1.25 "{MAGIC-BOX}" " "
	move from TRANS.nw down .48
	line invisible right 1.75 "{LAYER 4}" " "
	move from TRANS.nw down .51
	line invisible right 1.75 " " "TRANSPORT"
	line from TRANS.nw to TRANS.sw
	move from TRANS.nw down .005
	line right .875
NET:	box with .n at TRANS.s
	move from NET.w up .015
	line invisible right 1.75 "{LAYER 3}" " "
	move from NET.w down .015
	line invisible right 1.75 " " "{NETWORK}"
DL:	box with .n at NET.s
	move from DL.w up .015
	line invisible right 1.75 "{LAYER 2}" " "
	move from DL.w down .015
	line invisible right 1.75 " " "{DATA LINK}"
PHY:	box with .n at DL.s
	move from PHY.w up .015
	line invisible right 1.75 "{LAYER 1}" " "
	move from PHY.w down .015
	line invisible right 1.75 " " "{PHYSICAL}"
#
#
	boxwid = 6.0
	move from PRES.e right .5; move up .3; X1: Here
	line invis right 6.0 "\hbox to 6.0in{$\circ\ $ NETWORK LAYER (OR BELOW):\hfil}" " "
	move from X1 down .25; X2: Here
	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} RE--INVENTS TCP\hfil}" " "
	move from X2 down .25; X4: Here
	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} PREVENTS USE OF BOARD--LEVEL PRODUCTS\hfil}" " "
	move from X4 down .25; X5: Here
	move from X5 down .3; X6: Here
	line invis right 6.0 "\hbox to 6.0in{$\circ\ $ SESSION LAYER (OR ABOVE):\hfil}" " "
	move from X6 down .25; X7: Here
	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} TOO MUCH DEPENDENCY ON TCP AND THE\hfil}" " "
	move from X7 down .25; X8: Here
	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} ARPANET REFERENCE MODEL\hfil}" " "
	move from X8 down .25; X9: Here
	move from X9 down .3; X10: Here
	line invis right 6.0 "\hbox to 6.0in{$\circ\ $ TRANSPORT SERVICE ACCESS POINT (TSAP):\hfil}" " "
	move from X10 down .25; X11: Here
XA:	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $ I} TAKES ADVANTAGE OF TCP's STRENGTHS,\hfil}" " "
	move from X11 down .25; X12: Here
	line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} WHILE GIVING ISO A FREE HAND ABOVE\hfil}" " "
.ps 1
	move from XA.e left .75; XA1: Here
	line dotted from XA1 right .001
##
.PE

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