--- service: a.root-servers.net start-period: '2013-12-01T00:00:00Z' end-period: '2013-12-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1237045726 dns-udp-queries-received-ipv6: 69942108 dns-tcp-queries-received-ipv4: 6460470 dns-tcp-queries-received-ipv6: 1197800 dns-udp-responses-sent-ipv4: 1234495145 dns-udp-responses-sent-ipv6: 69950149 dns-tcp-responses-sent-ipv4: 6779349 dns-tcp-responses-sent-ipv6: 209