--- service: a.root-servers.net start-period: '2015-08-22T00:00:00Z' end-period: '2015-08-22T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3781270033 dns-udp-queries-received-ipv6: 185406631 dns-tcp-queries-received-ipv4: 16404917 dns-tcp-queries-received-ipv6: 8891914 dns-udp-responses-sent-ipv4: 3805458581 dns-udp-responses-sent-ipv6: 187969780 dns-tcp-responses-sent-ipv4: 13821483 dns-tcp-responses-sent-ipv6: 7547001