--- service: d.root-servers.net start-period: '2016-05-15T00:00:00Z' end-period: '2016-05-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 8508227857 dns-udp-queries-received-ipv6: 877892251 dns-tcp-queries-received-ipv4: 33763426 dns-tcp-queries-received-ipv6: 753440 dns-udp-responses-sent-ipv4: 8482563481 dns-udp-responses-sent-ipv6: 877318175 dns-tcp-responses-sent-ipv4: 33663018 dns-tcp-responses-sent-ipv6: 753264