--- service: a.root-servers.net start-period: '2014-01-28T00:00:00Z' end-period: '2014-01-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1181362554 dns-udp-queries-received-ipv6: 49750897 dns-tcp-queries-received-ipv4: 6659454 dns-tcp-queries-received-ipv6: 1146092 dns-udp-responses-sent-ipv4: 1180311357 dns-udp-responses-sent-ipv6: 49731926 dns-tcp-responses-sent-ipv4: 6761676 dns-tcp-responses-sent-ipv6: 60