arp -a 出现很多 外网IP MAC地址为:01-00-5E-开头的MAC 这是什么情况?

arp -a 出现许多 外网IP MAC地址为：01-00-5E-开头的MAC 192.168.0.255 ff-ff-ff-ff-ff-ff static 224.0.0.2 01-00-5e-00-00-02 static 224.0.0.22 01-00-5e-00-00-16 static 224.0.0.251 01-00-5e-00-00-fb static 224.0.0.252 01-00-5e-00-00-fc static 224.82.175.180 01-00-5e-52-af-b4 static 224.181.116.118 01-00-5e-35-74-76 static 225.68.186.222 01-00-5e-44-ba-de static 225.72.87.125 01-00-5e-48-57-7d static 225.102.204.1 01-00-5e-66-cc-01 static 225.208.143.61 01-00-5e-50-8f-3d static 226.14.205.120 01-00-5e-0e-cd-78 static 226.97.74.222 01-00-5e-61-4a-de static 226.116.180.222 01-00-5e-74-b4-de static 226.176.104.113 01-00-5e-30-68-71 static 226.225.43.117 01-00-5e-61-2b-75 static 226.253.190.60 01-00-5e-7d-be-3c static 227.86.85.222 01-00-5e-56-55-de static 227.144.76.222 01-00-5e-10-4c-de static 227.219.130.219 01-00-5e-5b-82-db static 229.255.255.250 01-00-5e-7f-ff-fa static 230.79.175.222 01-00-5e-4f-af-de static 230.156.22.218 01-00-5e-1c-16-da static 230.186.96.113 01-00-5e-3a-60-71 static 231.155.141.61 01-00-5e-1b-8d-3d static 232.54.22.183 01-00-5e-36-16-b7 static 232.147.183.118 01-00-5e-13-b7-76 static