--- service: j.root-servers.net start-period: '2015-06-18T00:00:00Z' end-period: '2015-06-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3197390277 dns-udp-queries-received-ipv6: 252925886 dns-tcp-queries-received-ipv4: 28551169 dns-tcp-queries-received-ipv6: 17531266 dns-udp-responses-sent-ipv4: 3123647557 dns-udp-responses-sent-ipv6: 252778825 dns-tcp-responses-sent-ipv4: 27710906 dns-tcp-responses-sent-ipv6: 16397155