--- service: i.root-servers.net start-period: '2016-02-27T00:00:00Z' end-period: '2016-02-28T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4546805253 dns-udp-queries-received-ipv6: 391790757 dns-tcp-queries-received-ipv4: 14183889 dns-tcp-queries-received-ipv6: 1200838 dns-udp-responses-sent-ipv4: 4478055936 dns-udp-responses-sent-ipv6: 391323432 dns-tcp-responses-sent-ipv4: 13961211 dns-tcp-responses-sent-ipv6: 1202338