--- service: a.root-servers.net start-period: '2016-08-18T00:00:00Z' end-period: '2016-08-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3759458379 dns-udp-queries-received-ipv6: 475994485 dns-tcp-queries-received-ipv4: 53119037 dns-tcp-queries-received-ipv6: 5552853 dns-udp-responses-sent-ipv4: 3746681895 dns-udp-responses-sent-ipv6: 475956280 dns-tcp-responses-sent-ipv4: 51161719 dns-tcp-responses-sent-ipv6: 4075388