63 db

73 db

83 db

93 db

stop-and-wait

go-back-n

selective-reject

both (a) and (b)

Does not require global time synchronization

does require global time synchronization

both (a) and (b)

none of these

non-return to zero code

polar code

both 1)non-return to zero code and 2)polar code

none of these

TDMA

stop and wait

continuous ARQ

none of these