--- service: a.root-servers.net start-period: '2016-01-27T00:00:00Z' end-period: '2016-01-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4976698792 dns-udp-queries-received-ipv6: 336796529 dns-tcp-queries-received-ipv4: 57933747 dns-tcp-queries-received-ipv6: 2167799 dns-udp-responses-sent-ipv4: 4953651197 dns-udp-responses-sent-ipv6: 337214563 dns-tcp-responses-sent-ipv4: 49761086 dns-tcp-responses-sent-ipv6: 281387