--- service: j.root-servers.net start-period: '2015-04-28T00:00:00Z' end-period: '2015-04-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3423193530 dns-udp-queries-received-ipv6: 211017702 dns-tcp-queries-received-ipv4: 23970533 dns-tcp-queries-received-ipv6: 4986746 dns-udp-responses-sent-ipv4: 3416565166 dns-udp-responses-sent-ipv6: 210892175 dns-tcp-responses-sent-ipv4: 23642898 dns-tcp-responses-sent-ipv6: 4158610