--- service: a.root-servers.net start-period: '2013-12-29T00:00:00Z' end-period: '2013-12-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1100099233 dns-udp-queries-received-ipv6: 45759100 dns-tcp-queries-received-ipv4: 6130138 dns-tcp-queries-received-ipv6: 673079 dns-udp-responses-sent-ipv4: 1099064682 dns-udp-responses-sent-ipv6: 45766023 dns-tcp-responses-sent-ipv4: 6473179 dns-tcp-responses-sent-ipv6: 77