--- service: a.root-servers.net start-period: '2016-06-29T00:00:00Z' end-period: '2016-06-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4350645489 dns-udp-queries-received-ipv6: 479088423 dns-tcp-queries-received-ipv4: 73342235 dns-tcp-queries-received-ipv6: 6883310 dns-udp-responses-sent-ipv4: 4350306746 dns-udp-responses-sent-ipv6: 479102818 dns-tcp-responses-sent-ipv4: 60508732 dns-tcp-responses-sent-ipv6: 308172