--- service: i.root-servers.net start-period: '2015-06-22T00:00:00Z' end-period: '2015-06-23T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3569301544 dns-udp-queries-received-ipv6: 242947341 dns-tcp-queries-received-ipv4: 11077894 dns-tcp-queries-received-ipv6: 260932 dns-udp-responses-sent-ipv4: 3522678584 dns-udp-responses-sent-ipv6: 247678388 dns-tcp-responses-sent-ipv4: 11046646 dns-tcp-responses-sent-ipv6: 260799