--- service: a.root-servers.net start-period: '2016-07-15T00:00:00Z' end-period: '2016-07-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4316243614 dns-udp-queries-received-ipv6: 481360797 dns-tcp-queries-received-ipv4: 78036491 dns-tcp-queries-received-ipv6: 7179433 dns-udp-responses-sent-ipv4: 4306606918 dns-udp-responses-sent-ipv6: 481483732 dns-tcp-responses-sent-ipv4: 67182283 dns-tcp-responses-sent-ipv6: 1373508