A receive-only sniffer cable can be very useful if you want to sniff out someones network without being detected. Some intrusion detection systems can detect when a client PC is plugged into a network. Using 1-way, receive-only sniffer cable you can be assured your computer won’t be sending any traffic over the network.

Pin Layout
  Target end:
      1  wire one
      2  wire two
      3  wire one
      4
      5
      6  wire two
      7
      8

    Sniffer end:
      1
      2
      3  wire one
      4
      5
      6  wire two
      7
      8