--- service: a.root-servers.net start-period: '2015-03-17T00:00:00Z' end-period: '2015-03-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2909076723 dns-udp-queries-received-ipv6: 232290387 dns-tcp-queries-received-ipv4: 20247486 dns-tcp-queries-received-ipv6: 2409509 dns-udp-responses-sent-ipv4: 2899711891 dns-udp-responses-sent-ipv6: 231794580 dns-tcp-responses-sent-ipv4: 17724318 dns-tcp-responses-sent-ipv6: 1576491