--- service: i.root-servers.net start-period: '2015-04-24T00:00:00Z' end-period: '2015-04-25T00:00:12Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3725755015 dns-udp-queries-received-ipv6: 260237934 dns-tcp-queries-received-ipv4: 11487018 dns-tcp-queries-received-ipv6: 295588 dns-udp-responses-sent-ipv4: 3670096989 dns-udp-responses-sent-ipv6: 260138886 dns-tcp-responses-sent-ipv4: 11530001 dns-tcp-responses-sent-ipv6: 300527