短語詞組短語PPP Bridge Protocol Data Unit 網(wǎng)橋協(xié)議數(shù)據(jù)單元BPDU Bridge protocol data unit 橋接協(xié)議數(shù)據(jù)單元;網(wǎng)橋協(xié)議數(shù) 返回 bridge protocol data unit