--- service: i.root-servers.net start-period: '2015-04-04T00:00:00Z' end-period: '2015-04-05T00:00:14Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3066631956 dns-udp-queries-received-ipv6: 229461576 dns-tcp-queries-received-ipv4: 7486129 dns-tcp-queries-received-ipv6: 255073 dns-udp-responses-sent-ipv4: 3021907605 dns-udp-responses-sent-ipv6: 232307646 dns-tcp-responses-sent-ipv4: 7509721 dns-tcp-responses-sent-ipv6: 263720