--- service: a.root-servers.net start-period: '2015-01-06T00:00:00Z' end-period: '2015-01-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3019049439 dns-udp-queries-received-ipv6: 194633997 dns-tcp-queries-received-ipv4: 19152700 dns-tcp-queries-received-ipv6: 2480073 dns-udp-responses-sent-ipv4: 3018527493 dns-udp-responses-sent-ipv6: 194608997 dns-tcp-responses-sent-ipv4: 18020020 dns-tcp-responses-sent-ipv6: 1603898