--- service: a.root-servers.net start-period: '2015-07-07T00:00:00Z' end-period: '2015-07-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3055405877 dns-udp-queries-received-ipv6: 274621365 dns-tcp-queries-received-ipv4: 19562637 dns-tcp-queries-received-ipv6: 10048049 dns-udp-responses-sent-ipv4: 3085792673 dns-udp-responses-sent-ipv6: 276776903 dns-tcp-responses-sent-ipv4: 16487574 dns-tcp-responses-sent-ipv6: 8455613