--- service: i.root-servers.net start-period: '2015-03-25T00:00:00Z' end-period: '2015-03-26T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4073472718 dns-udp-queries-received-ipv6: 305942325 dns-tcp-queries-received-ipv4: 14105754 dns-tcp-queries-received-ipv6: 582920 dns-udp-responses-sent-ipv4: 4020688177 dns-udp-responses-sent-ipv6: 309527544 dns-tcp-responses-sent-ipv4: 13898249 dns-tcp-responses-sent-ipv6: 577555