--- service: i.root-servers.net start-period: '2015-01-28T00:00:00Z' end-period: '2015-01-29T00:00:12Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3298071309 dns-udp-queries-received-ipv6: 260351548 dns-tcp-queries-received-ipv4: 7415618 dns-tcp-queries-received-ipv6: 218508 dns-udp-responses-sent-ipv4: 3271458075 dns-udp-responses-sent-ipv6: 261645082 dns-tcp-responses-sent-ipv4: 7453737 dns-tcp-responses-sent-ipv6: 224132