--- service: j.root-servers.net start-period: '2015-06-01T00:00:00Z' end-period: '2015-06-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3320016861 dns-udp-queries-received-ipv6: 252465550 dns-tcp-queries-received-ipv4: 27272470 dns-tcp-queries-received-ipv6: 6724659 dns-udp-responses-sent-ipv4: 3259396156 dns-udp-responses-sent-ipv6: 252353694 dns-tcp-responses-sent-ipv4: 26581278 dns-tcp-responses-sent-ipv6: 4594669