--- service: a.root-servers.net start-period: '2015-03-11T00:00:00Z' end-period: '2015-03-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3069876774 dns-udp-queries-received-ipv6: 236105348 dns-tcp-queries-received-ipv4: 18983107 dns-tcp-queries-received-ipv6: 2338673 dns-udp-responses-sent-ipv4: 3067751185 dns-udp-responses-sent-ipv6: 236022131 dns-tcp-responses-sent-ipv4: 16704560 dns-tcp-responses-sent-ipv6: 1374397