--- service: a.root-servers.net start-period: '2017-01-16T00:00:00Z' end-period: '2017-01-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4484450503 dns-udp-queries-received-ipv6: 481478742 dns-tcp-queries-received-ipv4: 133516026 dns-tcp-queries-received-ipv6: 9211935 dns-udp-responses-sent-ipv4: 4478666968 dns-udp-responses-sent-ipv6: 481337242 dns-tcp-responses-sent-ipv4: 134489129 dns-tcp-responses-sent-ipv6: 9214490