--- service: a.root-servers.net start-period: '2013-12-24T00:00:00Z' end-period: '2013-12-24T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1087487171 dns-udp-queries-received-ipv6: 51950025 dns-tcp-queries-received-ipv4: 6065896 dns-tcp-queries-received-ipv6: 624302 dns-udp-responses-sent-ipv4: 1086757928 dns-udp-responses-sent-ipv6: 51954865 dns-tcp-responses-sent-ipv4: 6052958 dns-tcp-responses-sent-ipv6: 90