--- service: a.root-servers.net start-period: '2014-12-31T00:00:00Z' end-period: '2014-12-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2312328704 dns-udp-queries-received-ipv6: 185263005 dns-tcp-queries-received-ipv4: 15203157 dns-tcp-queries-received-ipv6: 2326082 dns-udp-responses-sent-ipv4: 2311793228 dns-udp-responses-sent-ipv6: 185264888 dns-tcp-responses-sent-ipv4: 14201513 dns-tcp-responses-sent-ipv6: 1608134