--- service: a.root-servers.net start-period: '2017-01-27T00:00:00Z' end-period: '2017-01-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4208383244 dns-udp-queries-received-ipv6: 478899946 dns-tcp-queries-received-ipv4: 145538470 dns-tcp-queries-received-ipv6: 7971584 dns-udp-responses-sent-ipv4: 4203873612 dns-udp-responses-sent-ipv6: 478766275 dns-tcp-responses-sent-ipv4: 145803270 dns-tcp-responses-sent-ipv6: 7963374