--- service: i.root-servers.net start-period: '2014-01-22T00:00:00Z' end-period: '2014-01-23T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2555207649 dns-udp-queries-received-ipv6: 159168313 dns-tcp-queries-received-ipv4: 5160023 dns-tcp-queries-received-ipv6: 261887 dns-udp-responses-sent-ipv4: 2498200419 dns-udp-responses-sent-ipv6: 158870076 dns-tcp-responses-sent-ipv4: 5156185 dns-tcp-responses-sent-ipv6: 264511