--- service: i.root-servers.net start-period: '2013-08-14T00:00:00Z' end-period: '2013-08-15T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2144208713 dns-udp-queries-received-ipv6: 145437331 dns-tcp-queries-received-ipv4: 4812333 dns-tcp-queries-received-ipv6: 191382 dns-udp-responses-sent-ipv4: 2096457948 dns-udp-responses-sent-ipv6: 145408979 dns-tcp-responses-sent-ipv4: 4793213 dns-tcp-responses-sent-ipv6: 192328