--- service: i.root-servers.net start-period: '2015-04-10T00:00:00Z' end-period: '2015-04-11T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3593125194 dns-udp-queries-received-ipv6: 255091065 dns-tcp-queries-received-ipv4: 8234135 dns-tcp-queries-received-ipv6: 278025 dns-udp-responses-sent-ipv4: 3531633732 dns-udp-responses-sent-ipv6: 254993497 dns-tcp-responses-sent-ipv4: 8190366 dns-tcp-responses-sent-ipv6: 283786