--- service: a.root-servers.net start-period: '2015-06-22T00:00:00Z' end-period: '2015-06-22T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2752989893 dns-udp-queries-received-ipv6: 247184520 dns-tcp-queries-received-ipv4: 16717841 dns-tcp-queries-received-ipv6: 8518353 dns-udp-responses-sent-ipv4: 2810841982 dns-udp-responses-sent-ipv6: 251900426 dns-tcp-responses-sent-ipv4: 13758063 dns-tcp-responses-sent-ipv6: 7080558