--- service: i.root-servers.net start-period: '2015-01-03T00:00:00Z' end-period: '2015-01-04T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2890420724 dns-udp-queries-received-ipv6: 215328273 dns-tcp-queries-received-ipv4: 6894766 dns-tcp-queries-received-ipv6: 194946 dns-udp-responses-sent-ipv4: 2868881946 dns-udp-responses-sent-ipv6: 215266646 dns-tcp-responses-sent-ipv4: 7069138 dns-tcp-responses-sent-ipv6: 198565