--- service: j.root-servers.net start-period: '2015-06-21T00:00:00Z' end-period: '2015-06-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2689101242 dns-udp-queries-received-ipv6: 232388464 dns-tcp-queries-received-ipv4: 25494421 dns-tcp-queries-received-ipv6: 17031853 dns-udp-responses-sent-ipv4: 2625669890 dns-udp-responses-sent-ipv6: 232300813 dns-tcp-responses-sent-ipv4: 24862861 dns-tcp-responses-sent-ipv6: 15662142