--- service: a.root-servers.net start-period: '2015-07-26T00:00:00Z' end-period: '2015-07-26T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4163854592 dns-udp-queries-received-ipv6: 247167552 dns-tcp-queries-received-ipv4: 16276766 dns-tcp-queries-received-ipv6: 11336481 dns-udp-responses-sent-ipv4: 4189881916 dns-udp-responses-sent-ipv6: 249083501 dns-tcp-responses-sent-ipv4: 13806885 dns-tcp-responses-sent-ipv6: 9774930