--- service: i.root-servers.net start-period: '2015-05-27T00:00:00Z' end-period: '2015-05-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3756404550 dns-udp-queries-received-ipv6: 258242202 dns-tcp-queries-received-ipv4: 12418077 dns-tcp-queries-received-ipv6: 301330 dns-udp-responses-sent-ipv4: 3703276435 dns-udp-responses-sent-ipv6: 261113448 dns-tcp-responses-sent-ipv4: 12420716 dns-tcp-responses-sent-ipv6: 301695