--- service: i.root-servers.net start-period: '2015-07-09T00:00:00Z' end-period: '2015-07-10T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3723684977 dns-udp-queries-received-ipv6: 259705013 dns-tcp-queries-received-ipv4: 10966739 dns-tcp-queries-received-ipv6: 272237 dns-udp-responses-sent-ipv4: 3673742087 dns-udp-responses-sent-ipv6: 264154595 dns-tcp-responses-sent-ipv4: 10887696 dns-tcp-responses-sent-ipv6: 272682