--- service: j.root-servers.net start-period: '2015-09-20T00:00:00Z' end-period: '2015-09-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4659847827 dns-udp-queries-received-ipv6: 484533039 dns-tcp-queries-received-ipv4: 62481841 dns-tcp-queries-received-ipv6: 21622467 dns-udp-responses-sent-ipv4: 3521484472 dns-udp-responses-sent-ipv6: 483042850 dns-tcp-responses-sent-ipv4: 60761585 dns-tcp-responses-sent-ipv6: 19849398