--- service: i.root-servers.net start-period: '2015-05-12T00:00:00Z' end-period: '2015-05-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3851037747 dns-udp-queries-received-ipv6: 268002088 dns-tcp-queries-received-ipv4: 10941023 dns-tcp-queries-received-ipv6: 258382 dns-udp-responses-sent-ipv4: 3796481338 dns-udp-responses-sent-ipv6: 271196102 dns-tcp-responses-sent-ipv4: 10966090 dns-tcp-responses-sent-ipv6: 263007