--- service: a.root-servers.net start-period: '2015-09-06T00:00:00Z' end-period: '2015-09-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4426841368 dns-udp-queries-received-ipv6: 253310263 dns-tcp-queries-received-ipv4: 19015219 dns-tcp-queries-received-ipv6: 9665917 dns-udp-responses-sent-ipv4: 4451673852 dns-udp-responses-sent-ipv6: 255479024 dns-tcp-responses-sent-ipv4: 16401964 dns-tcp-responses-sent-ipv6: 8215151