--- service: i.root-servers.net start-period: '2015-08-21T00:00:00Z' end-period: '2015-08-22T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3775107402 dns-udp-queries-received-ipv6: 262773995 dns-tcp-queries-received-ipv4: 30738944 dns-tcp-queries-received-ipv6: 372060 dns-udp-responses-sent-ipv4: 5339347331 dns-udp-responses-sent-ipv6: 262781491 dns-tcp-responses-sent-ipv4: 30814153 dns-tcp-responses-sent-ipv6: 376871