--- service: a.root-servers.net start-period: '2015-06-29T00:00:00Z' end-period: '2015-06-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2976818971 dns-udp-queries-received-ipv6: 256668474 dns-tcp-queries-received-ipv4: 17546005 dns-tcp-queries-received-ipv6: 9151632 dns-udp-responses-sent-ipv4: 3000575815 dns-udp-responses-sent-ipv6: 258586492 dns-tcp-responses-sent-ipv4: 14947039 dns-tcp-responses-sent-ipv6: 7637235