Network

parity check, CRC, checksum, FEC, Hamming distance, block code

Flow control, Sliding Window, Error control, ARQ(Stop-and-Wait, Go-Back-N, Selective-Reject), HDLC

Multiplexing(MUX/DEMUX), FDM, TDM, WDM, Duplex(FDD/TDD), Multiple Channel Access(FDMA/TDMA)

Circuit Switching(Establish/Transfer/Disconnect), Blocking & Non-blocking network, Space Division switching, Packet Switching