--- service: a.root-servers.net start-period: '2017-01-28T00:00:00Z' end-period: '2017-01-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3828400857 dns-udp-queries-received-ipv6: 447945425 dns-tcp-queries-received-ipv4: 133075000 dns-tcp-queries-received-ipv6: 7188814 dns-udp-responses-sent-ipv4: 3823183412 dns-udp-responses-sent-ipv6: 447759515 dns-tcp-responses-sent-ipv4: 133542231 dns-tcp-responses-sent-ipv6: 7173981