--- service: i.root-servers.net start-period: '2013-05-31T00:00:00Z' end-period: '2013-06-01T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2114676350 dns-udp-queries-received-ipv6: 106228238 dns-tcp-queries-received-ipv4: 3422123 dns-tcp-queries-received-ipv6: 121756 dns-udp-responses-sent-ipv4: 2117753142 dns-udp-responses-sent-ipv6: 113964589 dns-tcp-responses-sent-ipv4: 3636635 dns-tcp-responses-sent-ipv6: 121872