--- service: a.root-servers.net start-period: '2016-01-02T00:00:00Z' end-period: '2016-01-02T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4257193409 dns-udp-queries-received-ipv6: 200545033 dns-tcp-queries-received-ipv4: 59836554 dns-tcp-queries-received-ipv6: 1420888 dns-udp-responses-sent-ipv4: 4249017402 dns-udp-responses-sent-ipv6: 200630265 dns-tcp-responses-sent-ipv4: 50746532 dns-tcp-responses-sent-ipv6: 174458