--- service: i.root-servers.net start-period: '2015-08-16T00:00:00Z' end-period: '2015-08-17T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3422531670 dns-udp-queries-received-ipv6: 243606108 dns-tcp-queries-received-ipv4: 29108404 dns-tcp-queries-received-ipv6: 316919 dns-udp-responses-sent-ipv4: 4890335135 dns-udp-responses-sent-ipv6: 243590614 dns-tcp-responses-sent-ipv4: 29130368 dns-tcp-responses-sent-ipv6: 321387