--- service: a.root-servers.net start-period: '2014-12-25T00:00:00Z' end-period: '2014-12-25T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2304398594 dns-udp-queries-received-ipv6: 177800719 dns-tcp-queries-received-ipv4: 12852671 dns-tcp-queries-received-ipv6: 2392828 dns-udp-responses-sent-ipv4: 2303929252 dns-udp-responses-sent-ipv6: 177798449 dns-tcp-responses-sent-ipv4: 11984897 dns-tcp-responses-sent-ipv6: 1591248