--- service: a.root-servers.net start-period: '2016-06-30T00:00:00Z' end-period: '2016-06-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4460510165 dns-udp-queries-received-ipv6: 458831927 dns-tcp-queries-received-ipv4: 74749702 dns-tcp-queries-received-ipv6: 6758723 dns-udp-responses-sent-ipv4: 4460216013 dns-udp-responses-sent-ipv6: 458820463 dns-tcp-responses-sent-ipv4: 61983667 dns-tcp-responses-sent-ipv6: 300768