--- service: i.root-servers.net start-period: '2013-08-10T00:00:00Z' end-period: '2013-08-11T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1881563197 dns-udp-queries-received-ipv6: 132088823 dns-tcp-queries-received-ipv4: 4059805 dns-tcp-queries-received-ipv6: 157584 dns-udp-responses-sent-ipv4: 1837202944 dns-udp-responses-sent-ipv6: 132063611 dns-tcp-responses-sent-ipv4: 4052060 dns-tcp-responses-sent-ipv6: 160607