--- service: i.root-servers.net start-period: '2015-08-15T00:00:00Z' end-period: '2015-08-16T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3218460862 dns-udp-queries-received-ipv6: 248963341 dns-tcp-queries-received-ipv4: 29770134 dns-tcp-queries-received-ipv6: 315109 dns-udp-responses-sent-ipv4: 4787442102 dns-udp-responses-sent-ipv6: 248948571 dns-tcp-responses-sent-ipv4: 29813889 dns-tcp-responses-sent-ipv6: 319091