--- service: a.root-servers.net start-period: '2016-06-01T00:00:00Z' end-period: '2016-06-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5893084125 dns-udp-queries-received-ipv6: 418413664 dns-tcp-queries-received-ipv4: 80705601 dns-tcp-queries-received-ipv6: 5032118 dns-udp-responses-sent-ipv4: 5894081125 dns-udp-responses-sent-ipv6: 418338343 dns-tcp-responses-sent-ipv4: 68552537 dns-tcp-responses-sent-ipv6: 308810