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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: move from TRANS.w up .015 ! 26: line invisible right 1.75 "{LAYER 4}" " " ! 27: move from TRANS.w down .015 ! 28: line invisible right 1.75 " " "{TRANSPORT}" ! 29: NET: box with .n at TRANS.s ! 30: move from NET.w up .015 ! 31: line invisible right 1.75 "{LAYER 3}" " " ! 32: move from NET.w down .015 ! 33: line invisible right 1.75 " " "{NETWORK}" ! 34: DL: box with .n at NET.s ! 35: move from DL.w up .015 ! 36: line invisible right 1.75 "{LAYER 2}" " " ! 37: move from DL.w down .015 ! 38: line invisible right 1.75 " " "{DATA LINK}" ! 39: PHY: box with .n at DL.s ! 40: move from PHY.w up .015 ! 41: line invisible right 1.75 "{LAYER 1}" " " ! 42: move from PHY.w down .015 ! 43: line invisible right 1.75 " " "{PHYSICAL}" ! 44: # ! 45: # ! 46: boxwid = 6.0 ! 47: move from UPRG.e right .5; X1: Here ! 48: move from X1 up .015 ! 49: line invis right 6.0 "\hbox to 6.0in{APPLICATION PROGRAMS\hfil}" " " ! 50: move from X1 down .015 ! 51: line invis right 6.0 " " "\hbox to 6.0in{(NOT PART OF THE OSI MODEL)\hfil}" ! 52: move from APP.e right .5; X2: Here ! 53: move from X2 up .015 ! 54: line invis right 6.0 "\hbox to 6.0in{PROVIDES ALL SERVICES DIRECTLY\hfil}" " " ! 55: move from X2 down .015 ! 56: line invis right 6.0 " " "\hbox to 6.0in{COMPREHENSIBLE TO APPLICATION PROGRAMS\hfil}" ! 57: move from PRES.e right .5; X3: Here ! 58: move from X3 up .015 ! 59: line invis right 6.0 "\hbox to 6.0in{RESTRUCTURES DATA TO/FROM STANDARDIZED\hfil}" " " ! 60: move from X3 down .015 ! 61: line invis right 6.0 " " "\hbox to 6.0in{FORMAT USED WITHIN THE NETWORK\hfil}" ! 62: move from SESS.e right .5; X4: Here ! 63: line invis from X4 right 6.0 "\hbox to 6.0in{SYNCHRONIZE \& MANAGE DATA\hfil}" ! 64: move from TRANS.e right .5; X5: Here ! 65: move from X5 up .015 ! 66: line invis right 6.0 "\hbox to 6.0in{PROVIDES TRANSPARENT, RELIABLE DATA\hfil}" " " ! 67: move from X5 down .015 ! 68: line invis right 6.0 " " "\hbox to 6.0in{TRANSFER FROM END NODE TO END NODE\hfil}" ! 69: move from NET.e right .5; X6: Here ! 70: move from X6 up .015 ! 71: line invis right 6.0 "\hbox to 6.0in{PERFORMS PACKET ROUTING FOR DATA\hfil}" " " ! 72: move from X6 down .015 ! 73: line invis right 6.0 " " "\hbox to 6.0in{TRANSFERS BETWEEN NODES\hfil}" ! 74: move from DL.e right .5; X7: Here ! 75: move from X7 up .015 ! 76: line invis right 6.0 "\hbox to 6.0in{IMPROVES ERROR RATE FOR FRAMES MOVED\hfil}" " " ! 77: move from X7 down .015 ! 78: XA: line invis right 6.0 " " "\hbox to 6.0in{BETWEEN ADJACENT NODES\hfil}" ! 79: move from PHY.e right .5; X8: Here ! 80: move from X8 up .015 ! 81: line invis right 6.0 "\hbox to 6.0in{ENCODES AND PHYSICALLY TRANSFERS BITS\hfil}" " " ! 82: move from X8 down .015 ! 83: line invis right 6.0 " " "\hbox to 6.0in{BETWEEN ADJACENT NODES\hfil}" ! 84: .ps 1 ! 85: move from XA.e left .75; XA1: Here ! 86: line dotted from XA1 right .001 ! 87: .PE
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