--- service: i.root-servers.net start-period: '2015-07-31T00:00:00Z' end-period: '2015-08-01T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5187166514 dns-udp-queries-received-ipv6: 266478335 dns-tcp-queries-received-ipv4: 12833004 dns-tcp-queries-received-ipv6: 282694 dns-udp-responses-sent-ipv4: 5152845216 dns-udp-responses-sent-ipv6: 268753862 dns-tcp-responses-sent-ipv4: 12775042 dns-tcp-responses-sent-ipv6: 289857