--- service: a.root-servers.net start-period: '2017-02-27T00:00:00Z' end-period: '2017-02-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4964088048 dns-udp-queries-received-ipv6: 491140338 dns-tcp-queries-received-ipv4: 189650649 dns-tcp-queries-received-ipv6: 9704217 dns-udp-responses-sent-ipv4: 4961021727 dns-udp-responses-sent-ipv6: 491085221 dns-tcp-responses-sent-ipv4: 190089471 dns-tcp-responses-sent-ipv6: 9770210