--- service: j.root-servers.net start-period: '2015-06-30T00:00:00Z' end-period: '2015-06-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3157136804 dns-udp-queries-received-ipv6: 256430456 dns-tcp-queries-received-ipv4: 31725939 dns-tcp-queries-received-ipv6: 18440718 dns-udp-responses-sent-ipv4: 3092060387 dns-udp-responses-sent-ipv6: 255686133 dns-tcp-responses-sent-ipv4: 31042561 dns-tcp-responses-sent-ipv6: 16510494