--- service: i.root-servers.net start-period: '2015-02-09T00:00:00Z' end-period: '2015-02-10T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3472610054 dns-udp-queries-received-ipv6: 260905127 dns-tcp-queries-received-ipv4: 6501399 dns-tcp-queries-received-ipv6: 197616 dns-udp-responses-sent-ipv4: 3421106168 dns-udp-responses-sent-ipv6: 260845400 dns-tcp-responses-sent-ipv4: 6551579 dns-tcp-responses-sent-ipv6: 207143