--- service: a.root-servers.net start-period: '2016-04-17T00:00:00Z' end-period: '2016-04-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4847077365 dns-udp-queries-received-ipv6: 317095405 dns-tcp-queries-received-ipv4: 68305688 dns-tcp-queries-received-ipv6: 2977892 dns-udp-responses-sent-ipv4: 4846565123 dns-udp-responses-sent-ipv6: 316803541 dns-tcp-responses-sent-ipv4: 57770163 dns-tcp-responses-sent-ipv6: 276681