--- service: a.root-servers.net start-period: '2013-12-06T00:00:00Z' end-period: '2013-12-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1523304710 dns-udp-queries-received-ipv6: 72313334 dns-tcp-queries-received-ipv4: 9032315 dns-tcp-queries-received-ipv6: 1235284 dns-udp-responses-sent-ipv4: 1521467809 dns-udp-responses-sent-ipv6: 72320105 dns-tcp-responses-sent-ipv4: 9473479 dns-tcp-responses-sent-ipv6: 153