--- service: i.root-servers.net start-period: '2015-09-28T00:00:00Z' end-period: '2015-09-29T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4119767934 dns-udp-queries-received-ipv6: 323433994 dns-tcp-queries-received-ipv4: 26567855 dns-tcp-queries-received-ipv6: 467234 dns-udp-responses-sent-ipv4: 4066498108 dns-udp-responses-sent-ipv6: 323522638 dns-tcp-responses-sent-ipv4: 26564676 dns-tcp-responses-sent-ipv6: 469680