--- service: j.root-servers.net start-period: '2015-02-21T00:00:00Z' end-period: '2015-02-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2819062035 dns-udp-queries-received-ipv6: 323346054 dns-tcp-queries-received-ipv4: 25546411 dns-tcp-queries-received-ipv6: 4059284 dns-udp-responses-sent-ipv4: 2814471480 dns-udp-responses-sent-ipv6: 323352684 dns-tcp-responses-sent-ipv4: 25220182 dns-tcp-responses-sent-ipv6: 3469443