--- service: i.root-servers.net start-period: '2015-06-02T00:00:00Z' end-period: '2015-06-03T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3717268220 dns-udp-queries-received-ipv6: 254481301 dns-tcp-queries-received-ipv4: 13541664 dns-tcp-queries-received-ipv6: 314586 dns-udp-responses-sent-ipv4: 3661277654 dns-udp-responses-sent-ipv6: 256937204 dns-tcp-responses-sent-ipv4: 13567841 dns-tcp-responses-sent-ipv6: 318948