--- service: i.root-servers.net start-period: '2015-02-27T00:00:00Z' end-period: '2015-02-28T00:00:06Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3485404135 dns-udp-queries-received-ipv6: 253643603 dns-tcp-queries-received-ipv4: 7500783 dns-tcp-queries-received-ipv6: 216873 dns-udp-responses-sent-ipv4: 3436742503 dns-udp-responses-sent-ipv6: 253623934 dns-tcp-responses-sent-ipv4: 7532473 dns-tcp-responses-sent-ipv6: 223290