--- service: a.root-servers.net start-period: '2015-03-07T00:00:00Z' end-period: '2015-03-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2691781004 dns-udp-queries-received-ipv6: 207503964 dns-tcp-queries-received-ipv4: 18086221 dns-tcp-queries-received-ipv6: 2193320 dns-udp-responses-sent-ipv4: 2689009450 dns-udp-responses-sent-ipv6: 207353007 dns-tcp-responses-sent-ipv4: 16023920 dns-tcp-responses-sent-ipv6: 1306443