--- service: a.root-servers.net start-period: '2015-04-09T00:00:00Z' end-period: '2015-04-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3234963966 dns-udp-queries-received-ipv6: 236169688 dns-tcp-queries-received-ipv4: 29992982 dns-tcp-queries-received-ipv6: 3393655 dns-udp-responses-sent-ipv4: 3221394197 dns-udp-responses-sent-ipv6: 235500956 dns-tcp-responses-sent-ipv4: 23996699 dns-tcp-responses-sent-ipv6: 1679976