--- service: a.root-servers.net start-period: '2014-07-28T00:00:00Z' end-period: '2014-07-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1403615449 dns-udp-queries-received-ipv6: 90943861 dns-tcp-queries-received-ipv4: 12835200 dns-tcp-queries-received-ipv6: 922220 dns-udp-responses-sent-ipv4: 1403553812 dns-udp-responses-sent-ipv6: 90944911 dns-tcp-responses-sent-ipv4: 13035495 dns-tcp-responses-sent-ipv6: 349768