--- service: j.root-servers.net start-period: '2015-05-20T00:00:00Z' end-period: '2015-05-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4474881759 dns-udp-queries-received-ipv6: 264966732 dns-tcp-queries-received-ipv4: 26123847 dns-tcp-queries-received-ipv6: 5146733 dns-udp-responses-sent-ipv4: 4396281329 dns-udp-responses-sent-ipv6: 264942523 dns-tcp-responses-sent-ipv4: 25359379 dns-tcp-responses-sent-ipv6: 3978670