--- service: i.root-servers.net start-period: '2015-06-28T00:00:00Z' end-period: '2015-06-29T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3131929733 dns-udp-queries-received-ipv6: 231146618 dns-tcp-queries-received-ipv4: 9513428 dns-tcp-queries-received-ipv6: 234999 dns-udp-responses-sent-ipv4: 3099240063 dns-udp-responses-sent-ipv6: 235057216 dns-tcp-responses-sent-ipv4: 9354558 dns-tcp-responses-sent-ipv6: 238285