Waa kuwee kuwa soo socda ee aan ahayn nooc shabakad ah: TYMNET, Telecom, ama TRANSPAC? Marka la eego su'aasha hore, ku qor macnaha guud ee jawaabta. Waxay noqon kartaa 1 ilaa 20 jumladood. Macnaha guud:
Waxaa jiray laba nooc oo X.25 ah. Qaar ka mid ah sida DATAPAC iyo TRANSPAC waxaa markii hore lagu hirgeliyey X.25 interface dibadda. Qaar ka mid ah shabakadaha qadiimiga ah sida TELENET iyo TYMNET ayaa wax laga beddelay si ay u bixiyaan X.25 martigeliyaha martigelinta marka lagu daro nidaamyada isku xirka martida ee hore. DATAPAC waxaa soo saaray shirkadda Bell Northern Research oo ah shirkad wadaag ah oo ay leeyihiin shirkadda Bell Canada (shirkad wadaag ah) iyo shirkadda Northern Telecom (qeybiyaha qalabka isgaarsiinta). Northern Telecom waxay dhowr DATAPAC clones u iibisay PTTs shisheeye oo ay ku jirto Deutsche Bundespost. X.75 iyo X.121 waxay u oggolaadeen isku xirnaanta shabakadaha X.25 ee qaranka. Isticmaalaha ama martigaliyaha ayaa wici kara martigaliyaha shabakad shisheeye isagoo ku daraya DNIC ee shabakadda fog qayb ka mid ah cinwaanka loo socdo. [ tixraac la baahan yahay ]