# File lib/ohai/plugins/darwin/network.rb, line 53
  def darwin_encaps_lookup(ifname)
    return "Loopback" if ifname.eql?("lo")
    return "1394" if ifname.eql?("fw")
    return "IPIP" if ifname.eql?("gif")
    return "6to4" if ifname.eql?("stf")
    return "dot1q" if ifname.eql?("vlan")
    "Unknown"
  end