--- service: a.root-servers.net start-period: '2016-07-11T00:00:00Z' end-period: '2016-07-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3876261721 dns-udp-queries-received-ipv6: 484691647 dns-tcp-queries-received-ipv4: 47503382 dns-tcp-queries-received-ipv6: 7866474 dns-udp-responses-sent-ipv4: 3875416716 dns-udp-responses-sent-ipv6: 484742053 dns-tcp-responses-sent-ipv4: 38811794 dns-tcp-responses-sent-ipv6: 1224674