--- service: i.root-servers.net start-period: '2013-09-27T00:00:00Z' end-period: '2013-09-28T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2289793396 dns-udp-queries-received-ipv6: 132375010 dns-tcp-queries-received-ipv4: 5568269 dns-tcp-queries-received-ipv6: 135778 dns-udp-responses-sent-ipv4: 2364612745 dns-udp-responses-sent-ipv6: 140929941 dns-tcp-responses-sent-ipv4: 5613573 dns-tcp-responses-sent-ipv6: 156258