--- service: i.root-servers.net start-period: '2016-01-24T00:00:00Z' end-period: '2016-01-25T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4077611895 dns-udp-queries-received-ipv6: 356416123 dns-tcp-queries-received-ipv4: 20139769 dns-tcp-queries-received-ipv6: 840990 dns-udp-responses-sent-ipv4: 4025269747 dns-udp-responses-sent-ipv6: 359466370 dns-tcp-responses-sent-ipv4: 20165619 dns-tcp-responses-sent-ipv6: 845424