--- service: i.root-servers.net start-period: '2013-08-18T00:00:00Z' end-period: '2013-08-19T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1805624869 dns-udp-queries-received-ipv6: 136357068 dns-tcp-queries-received-ipv4: 4330463 dns-tcp-queries-received-ipv6: 163686 dns-udp-responses-sent-ipv4: 1765813766 dns-udp-responses-sent-ipv6: 136330867 dns-tcp-responses-sent-ipv4: 4322988 dns-tcp-responses-sent-ipv6: 167098