--- service: a.root-servers.net start-period: '2015-06-11T00:00:00Z' end-period: '2015-06-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2847214114 dns-udp-queries-received-ipv6: 224535040 dns-tcp-queries-received-ipv4: 17536127 dns-tcp-queries-received-ipv6: 8285956 dns-udp-responses-sent-ipv4: 2875510390 dns-udp-responses-sent-ipv6: 227149724 dns-tcp-responses-sent-ipv4: 15073420 dns-tcp-responses-sent-ipv6: 6688027