--- service: i.root-servers.net start-period: '2016-04-23T00:00:00Z' end-period: '2016-04-24T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4895212776 dns-udp-queries-received-ipv6: 411732887 dns-tcp-queries-received-ipv4: 26272783 dns-tcp-queries-received-ipv6: 846562 dns-udp-responses-sent-ipv4: 4819710819 dns-udp-responses-sent-ipv6: 411204240 dns-tcp-responses-sent-ipv4: 26045985 dns-tcp-responses-sent-ipv6: 851628