--- service: a.root-servers.net start-period: '2016-06-28T00:00:00Z' end-period: '2016-06-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4331568958 dns-udp-queries-received-ipv6: 465365817 dns-tcp-queries-received-ipv4: 69014665 dns-tcp-queries-received-ipv6: 6956735 dns-udp-responses-sent-ipv4: 4331253307 dns-udp-responses-sent-ipv6: 465615675 dns-tcp-responses-sent-ipv4: 56684391 dns-tcp-responses-sent-ipv6: 302674