摘要：Co mmu nicatio n is very imp ortan t in SCADA sy stem s. In com muni cation , p roto co ls are needed to beim plemented to avoid so me pro blems. In the current state of SCADA co mmu nicatio n, two proto co ls arewidely used , the T101 o r IEC 6 087 0-5-1 01 (IEC101 ) an d the DNP3 (Distrib uted Netwo rk Protocol) . Inth is paper, we p resent each protocol an d d iscu ss the s pecification s of T101 and DNP3. This can h elpSCADA operat ors to select which p ro tocol is suited for the o peration s of th eir SCADA system
