48) Minimum number of bits required to represent all the symbols together is

49) A field in the Ethernet message packet is

50) If data rate of ring is 20 Mbps, signal propagation speed is 200 b/ms, then number of bits that can be placed on the channel of 200 km is

51) What signal-to-noise ratio is needed to put a T1 carrier on a T0-kHz line ?

52) In which ARQ, when a NAK is received, all frame sent since the last frame acknowledged an retransmitted