--- service: i.root-servers.net start-period: '2013-04-23T10:39:36Z' end-period: '2013-04-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 339131984 dns-udp-queries-received-ipv6: 13319931 dns-tcp-queries-received-ipv4: 577322 dns-tcp-queries-received-ipv6: 18412 dns-udp-responses-sent-ipv4: 324488960 dns-udp-responses-sent-ipv6: 13319127 dns-tcp-responses-sent-ipv4: 512630 dns-tcp-responses-sent-ipv6: 18392