--- service: a.root-servers.net start-period: '2015-10-13T00:00:00Z' end-period: '2015-10-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3377014425 dns-udp-queries-received-ipv6: 4632352 dns-tcp-queries-received-ipv4: 20960782 dns-tcp-queries-received-ipv6: 4005559 dns-udp-responses-sent-ipv4: 3387789747 dns-udp-responses-sent-ipv6: 4693395 dns-tcp-responses-sent-ipv4: 18475348 dns-tcp-responses-sent-ipv6: 4070282