--- service: i.root-servers.net start-period: '2015-05-22T00:00:00Z' end-period: '2015-05-23T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3935317432 dns-udp-queries-received-ipv6: 253110231 dns-tcp-queries-received-ipv4: 12690193 dns-tcp-queries-received-ipv6: 285676 dns-udp-responses-sent-ipv4: 3879487077 dns-udp-responses-sent-ipv6: 256003593 dns-tcp-responses-sent-ipv4: 12829853 dns-tcp-responses-sent-ipv6: 291058