# File lib/ohai/plugins/darwin/network.rb, line 64
def 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