--- service: a.root-servers.net start-period: '2015-06-04T00:00:00Z' end-period: '2015-06-04T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2740688538 dns-udp-queries-received-ipv6: 241310769 dns-tcp-queries-received-ipv4: 17646482 dns-tcp-queries-received-ipv6: 3069034 dns-udp-responses-sent-ipv4: 2769527922 dns-udp-responses-sent-ipv6: 243833314 dns-tcp-responses-sent-ipv4: 15922620 dns-tcp-responses-sent-ipv6: 1513842