--- service: a.root-servers.net start-period: '2015-09-09T00:00:00Z' end-period: '2015-09-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5267014363 dns-udp-queries-received-ipv6: 284549709 dns-tcp-queries-received-ipv4: 20498724 dns-tcp-queries-received-ipv6: 10041827 dns-udp-responses-sent-ipv4: 5295252277 dns-udp-responses-sent-ipv6: 287872001 dns-tcp-responses-sent-ipv4: 17570707 dns-tcp-responses-sent-ipv6: 8283004