--- service: a.root-servers.net start-period: '2016-12-01T00:00:00Z' end-period: '2016-12-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5335289397 dns-udp-queries-received-ipv6: 458256901 dns-tcp-queries-received-ipv4: 216942613 dns-tcp-queries-received-ipv6: 7757923 dns-udp-responses-sent-ipv4: 5318929047 dns-udp-responses-sent-ipv6: 457839893 dns-tcp-responses-sent-ipv4: 217705941 dns-tcp-responses-sent-ipv6: 7892491