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1.1 root 1: .PS
2: .ps 20
3: boxht = .754; boxwid = 1.75
4: UPRG: box
5: move from UPRG.w up .015
6: line invisible right 1.75 "{USER}" " "
7: move from UPRG.w down .015
8: line invisible right 1.75 " " "{PROGRAMS}"
9: APP: box with .n at UPRG.s
10: move from APP.w up .015
11: line invisible right 1.75 "{LAYER 7}" " "
12: move from APP.w down .015
13: line invisible right 1.75 " " "{APPLICATION}"
14: PRES: box with .n at APP.s
15: move from PRES.w up .015
16: line invisible right 1.75 "{LAYER 6}" " "
17: move from PRES.w down .015
18: line invisible right 1.75 " " "{PRESENTATION}"
19: SESS: box with .n at PRES.s
20: move from SESS.w up .015
21: line invisible right 1.75 "{LAYER 5}" " "
22: move from SESS.w down .015
23: line invisible right 1.75 " " "{SESSION}"
24: TRANS: box with .n at SESS.s
25: box shaded with .nw at TRANS.nw ht .24 width .875
26: move from TRANS.nw down .225
27: line invisible right .875 "{TSAP}" " "
28: move from TRANS.nw down .48
29: line invisible right 1.75 "{LAYER 4}" " "
30: move from TRANS.nw down .51
31: line invisible right 1.75 " " "TRANSPORT"
32: line from TRANS.nw to TRANS.sw
33: move from TRANS.nw down .005
34: line right .875
35: NET: box with .n at TRANS.s
36: move from NET.w up .015
37: line invisible right 1.75 "{LAYER 3}" " "
38: move from NET.w down .015
39: line invisible right 1.75 " " "{NETWORK}"
40: DL: box with .n at NET.s
41: move from DL.w up .015
42: line invisible right 1.75 "{LAYER 2}" " "
43: move from DL.w down .015
44: line invisible right 1.75 " " "{DATA LINK}"
45: PHY: box with .n at DL.s
46: move from PHY.w up .015
47: line invisible right 1.75 "{LAYER 1}" " "
48: move from PHY.w down .015
49: line invisible right 1.75 " " "{PHYSICAL}"
50: #
51: #
52: boxwid = 6.0
53: move from PRES.e right .5; move up .3; X1: Here
54: line invis right 6.0 "\hbox to 6.0in{$\circ\ $ NETWORK LAYER (OR BELOW):\hfil}" " "
55: move from X1 down .25; X2: Here
56: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} RE--INVENTS TCP\hfil}" " "
57: move from X2 down .25; X4: Here
58: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} PREVENTS USE OF BOARD--LEVEL PRODUCTS\hfil}" " "
59: move from X4 down .25; X5: Here
60: move from X5 down .3; X6: Here
61: line invis right 6.0 "\hbox to 6.0in{$\circ\ $ SESSION LAYER (OR ABOVE):\hfil}" " "
62: move from X6 down .25; X7: Here
63: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} TOO MUCH DEPENDENCY ON TCP AND THE\hfil}" " "
64: move from X7 down .25; X8: Here
65: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} ARPANET CLIENT/SERVICE MODEL\hfil}" " "
66: move from X8 down .25; X9: Here
67: move from X9 down .3; X10: Here
68: line invis right 6.0 "\hbox to 6.0in{$\circ\ $ TRANSPORT SERVICE ACCESS POINT (TSAP):\hfil}" " "
69: move from X10 down .25; X11: Here
70: XA: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $ I} TAKES ADVANTAGE OF TCP's STRENGTHS,\hfil}" " "
71: move from X11 down .25; X12: Here
72: line invis right 6.0 "\hbox to 6.0in{\hphantom{$\circ\ \ $\ I} WHILE GIVING MAP/TOP A FREE HAND ABOVE\hfil}" " "
73: .ps 1
74: move from XA.e left .75; XA1: Here
75: line dotted from XA1 right .001
76: .PE
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