--- service: a.root-servers.net start-period: '2016-04-18T00:00:00Z' end-period: '2016-04-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5315462176 dns-udp-queries-received-ipv6: 343858263 dns-tcp-queries-received-ipv4: 58691192 dns-tcp-queries-received-ipv6: 3427783 dns-udp-responses-sent-ipv4: 5315077824 dns-udp-responses-sent-ipv6: 343550137 dns-tcp-responses-sent-ipv4: 49362887 dns-tcp-responses-sent-ipv6: 275242