--- service: i.root-servers.net start-period: '2015-05-26T00:00:00Z' end-period: '2015-05-27T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3810563177 dns-udp-queries-received-ipv6: 258732322 dns-tcp-queries-received-ipv4: 11599301 dns-tcp-queries-received-ipv6: 290216 dns-udp-responses-sent-ipv4: 3754761606 dns-udp-responses-sent-ipv6: 261412321 dns-tcp-responses-sent-ipv4: 11641615 dns-tcp-responses-sent-ipv6: 294547