A.簡單網(wǎng)絡(luò)時間協(xié)議(SNTP) B.IRIG-B C.1PPS D.1PPM
A.99.90% B.99.60% C.99.50% D.99.00%
A.邏輯隔離 B.物理隔離 C.數(shù)據(jù)鏈路隔離 D.應(yīng)用隔離