--- service: a.root-servers.net start-period: '2013-12-23T00:00:00Z' end-period: '2013-12-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1302836634 dns-udp-queries-received-ipv6: 58264378 dns-tcp-queries-received-ipv4: 6782929 dns-tcp-queries-received-ipv6: 746171 dns-udp-responses-sent-ipv4: 1301105073 dns-udp-responses-sent-ipv6: 58269800 dns-tcp-responses-sent-ipv4: 6879945 dns-tcp-responses-sent-ipv6: 124