--- service: i.root-servers.net start-period: '2013-05-08T00:00:00Z' end-period: '2013-05-09T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2357681443 dns-udp-queries-received-ipv6: 113689874 dns-tcp-queries-received-ipv4: 3224947 dns-tcp-queries-received-ipv6: 117598 dns-udp-responses-sent-ipv4: 2365397857 dns-udp-responses-sent-ipv6: 121750647 dns-tcp-responses-sent-ipv4: 3291867 dns-tcp-responses-sent-ipv6: 117627