--- service: i.root-servers.net start-period: '2015-08-27T00:00:00Z' end-period: '2015-08-28T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3764441111 dns-udp-queries-received-ipv6: 278571908 dns-tcp-queries-received-ipv4: 28796045 dns-tcp-queries-received-ipv6: 420106 dns-udp-responses-sent-ipv4: 5326796726 dns-udp-responses-sent-ipv6: 278561006 dns-tcp-responses-sent-ipv4: 28876083 dns-tcp-responses-sent-ipv6: 424144