--- service: i.root-servers.net start-period: '2013-12-10T00:00:00Z' end-period: '2013-12-11T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2369979638 dns-udp-queries-received-ipv6: 140957375 dns-tcp-queries-received-ipv4: 5444578 dns-tcp-queries-received-ipv6: 310482 dns-udp-responses-sent-ipv4: 2318292305 dns-udp-responses-sent-ipv6: 141038039 dns-tcp-responses-sent-ipv4: 5458066 dns-tcp-responses-sent-ipv6: 314561