--- service: a.root-servers.net start-period: '2017-02-11T00:00:00Z' end-period: '2017-02-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4337484451 dns-udp-queries-received-ipv6: 463405592 dns-tcp-queries-received-ipv4: 144972323 dns-tcp-queries-received-ipv6: 7523685 dns-udp-responses-sent-ipv4: 4330165162 dns-udp-responses-sent-ipv6: 463288971 dns-tcp-responses-sent-ipv4: 145468173 dns-tcp-responses-sent-ipv6: 7553696