--- service: j.root-servers.net start-period: '2015-01-20T00:00:00Z' end-period: '2015-01-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3328988498 dns-udp-queries-received-ipv6: 254656684 dns-tcp-queries-received-ipv4: 30824671 dns-tcp-queries-received-ipv6: 5486219 dns-udp-responses-sent-ipv4: 3346717407 dns-udp-responses-sent-ipv6: 254639021 dns-tcp-responses-sent-ipv4: 31201792 dns-tcp-responses-sent-ipv6: 4740918