--- service: a.root-servers.net start-period: '2013-12-26T00:00:00Z' end-period: '2013-12-26T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1063344231 dns-udp-queries-received-ipv6: 51393957 dns-tcp-queries-received-ipv4: 5859301 dns-tcp-queries-received-ipv6: 694044 dns-udp-responses-sent-ipv4: 1061166780 dns-udp-responses-sent-ipv6: 51399171 dns-tcp-responses-sent-ipv4: 5849295 dns-tcp-responses-sent-ipv6: 76