--- service: a.root-servers.net start-period: '2016-04-12T00:00:00Z' end-period: '2016-04-12T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5538446707 dns-udp-queries-received-ipv6: 360348897 dns-tcp-queries-received-ipv4: 78846132 dns-tcp-queries-received-ipv6: 3389567 dns-udp-responses-sent-ipv4: 5536509951 dns-udp-responses-sent-ipv6: 360248010 dns-tcp-responses-sent-ipv4: 66746857 dns-tcp-responses-sent-ipv6: 272600