--- service: i.root-servers.net start-period: '2015-04-17T00:00:00Z' end-period: '2015-04-18T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3616986745 dns-udp-queries-received-ipv6: 260512749 dns-tcp-queries-received-ipv4: 11080119 dns-tcp-queries-received-ipv6: 281229 dns-udp-responses-sent-ipv4: 3564348977 dns-udp-responses-sent-ipv6: 260432872 dns-tcp-responses-sent-ipv4: 11142733 dns-tcp-responses-sent-ipv6: 286511