--- service: a.root-servers.net start-period: '2015-07-06T00:00:00Z' end-period: '2015-07-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2877452163 dns-udp-queries-received-ipv6: 270070413 dns-tcp-queries-received-ipv4: 18383034 dns-tcp-queries-received-ipv6: 9637408 dns-udp-responses-sent-ipv4: 2905412101 dns-udp-responses-sent-ipv6: 271983507 dns-tcp-responses-sent-ipv4: 15595144 dns-tcp-responses-sent-ipv6: 8200766