--- service: i.root-servers.net start-period: '2015-04-12T00:00:00Z' end-period: '2015-04-13T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3159041300 dns-udp-queries-received-ipv6: 232342373 dns-tcp-queries-received-ipv4: 7761169 dns-tcp-queries-received-ipv6: 269744 dns-udp-responses-sent-ipv4: 3104174402 dns-udp-responses-sent-ipv6: 232266412 dns-tcp-responses-sent-ipv4: 7744388 dns-tcp-responses-sent-ipv6: 276138