--- service: i.root-servers.net start-period: '2013-09-26T00:00:00Z' end-period: '2013-09-27T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2341285727 dns-udp-queries-received-ipv6: 136969572 dns-tcp-queries-received-ipv4: 5440684 dns-tcp-queries-received-ipv6: 120066 dns-udp-responses-sent-ipv4: 2417551504 dns-udp-responses-sent-ipv6: 145712312 dns-tcp-responses-sent-ipv4: 5474128 dns-tcp-responses-sent-ipv6: 140273