--- service: d.root-servers.net start-period: '2016-04-30T00:00:00Z' end-period: '2016-04-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4166932697 dns-udp-queries-received-ipv6: 593927679 dns-tcp-queries-received-ipv4: 37436506 dns-tcp-queries-received-ipv6: 546389 dns-udp-responses-sent-ipv4: 4154206307 dns-udp-responses-sent-ipv6: 593705747 dns-tcp-responses-sent-ipv4: 37327203 dns-tcp-responses-sent-ipv6: 546163