--- service: a.root-servers.net start-period: '2015-09-17T00:00:00Z' end-period: '2015-09-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4892823591 dns-udp-queries-received-ipv6: 277236847 dns-tcp-queries-received-ipv4: 22982010 dns-tcp-queries-received-ipv6: 10107791 dns-udp-responses-sent-ipv4: 4920091387 dns-udp-responses-sent-ipv6: 279963961 dns-tcp-responses-sent-ipv4: 19678438 dns-tcp-responses-sent-ipv6: 8545728