--- service: i.root-servers.net start-period: '2015-07-23T00:00:00Z' end-period: '2015-07-24T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5333771577 dns-udp-queries-received-ipv6: 246782281 dns-tcp-queries-received-ipv4: 13027372 dns-tcp-queries-received-ipv6: 287660 dns-udp-responses-sent-ipv4: 5287518819 dns-udp-responses-sent-ipv6: 251089725 dns-tcp-responses-sent-ipv4: 12927570 dns-tcp-responses-sent-ipv6: 293012