inserting a ′0 ′ in user stream to differentiate it with a lag

inserting a ′0 ′ in lag stream to avoid ambiguity

appending a nibble to the lag sequence

appending a nibble to the use data stream

simplex

half-duplex

full-duplex

All of these

106 to 108 Hz

1010 to 1011 Hz

103 to 104 Hz

None of these

10 base 5

10 base 2

10 base T

None of these

802.3

802.5

Both (a) and (b)

All of these