--- service: i.root-servers.net start-period: '2013-08-09T00:00:00Z' end-period: '2013-08-10T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2137811470 dns-udp-queries-received-ipv6: 144236067 dns-tcp-queries-received-ipv4: 4539304 dns-tcp-queries-received-ipv6: 167442 dns-udp-responses-sent-ipv4: 2084519265 dns-udp-responses-sent-ipv6: 144204108 dns-tcp-responses-sent-ipv4: 4534550 dns-tcp-responses-sent-ipv6: 169256