--- service: a.root-servers.net start-period: '2015-01-07T00:00:00Z' end-period: '2015-01-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2908904629 dns-udp-queries-received-ipv6: 207892461 dns-tcp-queries-received-ipv4: 18884077 dns-tcp-queries-received-ipv6: 2490340 dns-udp-responses-sent-ipv4: 2908003129 dns-udp-responses-sent-ipv6: 207873961 dns-tcp-responses-sent-ipv4: 18147078 dns-tcp-responses-sent-ipv6: 1602423