--- service: i.root-servers.net start-period: '2013-10-15T00:00:00Z' end-period: '2013-10-16T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2360263376 dns-udp-queries-received-ipv6: 127818244 dns-tcp-queries-received-ipv4: 4257018 dns-tcp-queries-received-ipv6: 170517 dns-udp-responses-sent-ipv4: 2427029461 dns-udp-responses-sent-ipv6: 135996302 dns-tcp-responses-sent-ipv4: 4320596 dns-tcp-responses-sent-ipv6: 183912