040000 tree 5966d42bed335008d0a27cce27589a0b92d4ea3e	device
040000 tree 04ffd780574eed999712815df9aed11ff3c16d92	host
040000 tree 639802c3289d43a4ba2a86aba76a9e170186f424	link
040000 tree 1f9083cfb2840430d91e636178ee4146644cece6	packet
040000 tree 1359db569e02051d1fa298b3b9df9f87b0e9df86	topology