--- service: i.root-servers.net start-period: '2013-09-09T00:00:00Z' end-period: '2013-09-10T00:00:06Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2484862360 dns-udp-queries-received-ipv6: 153701264 dns-tcp-queries-received-ipv4: 5361147 dns-tcp-queries-received-ipv6: 302013 dns-udp-responses-sent-ipv4: 2416312542 dns-udp-responses-sent-ipv6: 153648413 dns-tcp-responses-sent-ipv4: 5323353 dns-tcp-responses-sent-ipv6: 304148