🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPolskiPortuguês中文日本語EntityQ1517778· pop 12· linked from 72 articlesSynchronous Data Link ControlAlso known as SDLCcomputer communications protocol from IBM's Systems Network Architecture (SNA)Available in 12 languagesEspañolFrançaisDeutsch中文日本語PortuguêsCatalanCzechPolskiSlovenianUkrainianConnectionscommunication protocolEntityduplex communicationEntityCategoriesComputer network technologyLink protocolsSystems Network ArchitectureTelecommunication protocols