--- service: a.root-servers.net start-period: '2016-12-09T00:00:00Z' end-period: '2016-12-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4823431955 dns-udp-queries-received-ipv6: 505757499 dns-tcp-queries-received-ipv4: 228651271 dns-tcp-queries-received-ipv6: 8215122 dns-udp-responses-sent-ipv4: 4815740055 dns-udp-responses-sent-ipv6: 505054767 dns-tcp-responses-sent-ipv4: 230071961 dns-tcp-responses-sent-ipv6: 8191006