A.IPX Internetwork Packet Exchange protocol B.TCP(Transmission Control Protocol) C.UDP D.SNMP
A.28 B.24 C.30 D.32
A.加防雷器 B.線(xiàn)路整體整改,重新做接地 C.加隔離變壓器 D.零線(xiàn)和地線(xiàn)短接