--- service: a.root-servers.net start-period: '2014-07-23T00:00:00Z' end-period: '2014-07-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2018918606 dns-udp-queries-received-ipv6: 132729791 dns-tcp-queries-received-ipv4: 20522910 dns-tcp-queries-received-ipv6: 1416344 dns-udp-responses-sent-ipv4: 1994543739 dns-udp-responses-sent-ipv6: 132731197 dns-tcp-responses-sent-ipv4: 20706449 dns-tcp-responses-sent-ipv6: 430695