--- service: a.root-servers.net start-period: '2017-01-01T00:00:00Z' end-period: '2017-01-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4051382741 dns-udp-queries-received-ipv6: 447630403 dns-tcp-queries-received-ipv4: 170288979 dns-tcp-queries-received-ipv6: 7974123 dns-udp-responses-sent-ipv4: 4049786941 dns-udp-responses-sent-ipv6: 447395724 dns-tcp-responses-sent-ipv4: 170878110 dns-tcp-responses-sent-ipv6: 7982378