--- service: a.root-servers.net start-period: '2015-05-07T00:00:00Z' end-period: '2015-05-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2835076603 dns-udp-queries-received-ipv6: 213742872 dns-tcp-queries-received-ipv4: 22835883 dns-tcp-queries-received-ipv6: 2162642 dns-udp-responses-sent-ipv4: 2779445683 dns-udp-responses-sent-ipv6: 219200181 dns-tcp-responses-sent-ipv4: 18346979 dns-tcp-responses-sent-ipv6: 1113465