--- service: i.root-servers.net start-period: '2015-09-30T00:00:00Z' end-period: '2015-09-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2586017600 dns-udp-queries-received-ipv6: 216850585 dns-tcp-queries-received-ipv4: 14858286 dns-tcp-queries-received-ipv6: 288983 dns-udp-responses-sent-ipv4: 2542844714 dns-udp-responses-sent-ipv6: 215905098 dns-tcp-responses-sent-ipv4: 14871561 dns-tcp-responses-sent-ipv6: 291080