--- service: i.root-servers.net start-period: '2015-07-27T00:00:00Z' end-period: '2015-07-28T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5348458038 dns-udp-queries-received-ipv6: 239962565 dns-tcp-queries-received-ipv4: 12980334 dns-tcp-queries-received-ipv6: 280755 dns-udp-responses-sent-ipv4: 5298023807 dns-udp-responses-sent-ipv6: 244549834 dns-tcp-responses-sent-ipv4: 12972830 dns-tcp-responses-sent-ipv6: 283674