--- service: i.root-servers.net start-period: '2013-10-22T00:00:00Z' end-period: '2013-10-23T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2375133711 dns-udp-queries-received-ipv6: 130483187 dns-tcp-queries-received-ipv4: 4350131 dns-tcp-queries-received-ipv6: 190948 dns-udp-responses-sent-ipv4: 2448565726 dns-udp-responses-sent-ipv6: 138508427 dns-tcp-responses-sent-ipv4: 4376242 dns-tcp-responses-sent-ipv6: 200928