--- service: d.root-servers.net start-period: '2016-03-31T00:00:00Z' end-period: '2016-03-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4745851234 dns-udp-queries-received-ipv6: 597127482 dns-tcp-queries-received-ipv4: 35249109 dns-tcp-queries-received-ipv6: 605691 dns-udp-responses-sent-ipv4: 4720955479 dns-udp-responses-sent-ipv6: 596785118 dns-tcp-responses-sent-ipv4: 35216988 dns-tcp-responses-sent-ipv6: 605512