--- service: a.root-servers.net start-period: '2015-01-11T00:00:00Z' end-period: '2015-01-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2498596880 dns-udp-queries-received-ipv6: 193105190 dns-tcp-queries-received-ipv4: 14281872 dns-tcp-queries-received-ipv6: 2320982 dns-udp-responses-sent-ipv4: 2498321366 dns-udp-responses-sent-ipv6: 193110524 dns-tcp-responses-sent-ipv4: 13146835 dns-tcp-responses-sent-ipv6: 1742372