--- service: i.root-servers.net start-period: '2015-03-09T00:00:00Z' end-period: '2015-03-10T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3408553269 dns-udp-queries-received-ipv6: 259405647 dns-tcp-queries-received-ipv4: 7113722 dns-tcp-queries-received-ipv6: 212349 dns-udp-responses-sent-ipv4: 3357670862 dns-udp-responses-sent-ipv6: 263099997 dns-tcp-responses-sent-ipv4: 7151608 dns-tcp-responses-sent-ipv6: 217077