A.兩個(gè)子網(wǎng)的接入網(wǎng)元和網(wǎng)關(guān)通過交換機(jī)相連
B.兩個(gè)子網(wǎng)的接入網(wǎng)元通過SEIA網(wǎng)口相連
C.兩個(gè)子網(wǎng)的接入網(wǎng)元通過SPWA光口相連
D.兩個(gè)子網(wǎng)的接入網(wǎng)元通過SOSC光口相連
A.0dBm
B.-3dBm
C.-9dBm
D.-14dBm
A.-9dBm
B.-14dBm
C.-18dBm
D.-21dBm