--- service: a.root-servers.net start-period: '2016-02-28T00:00:00Z' end-period: '2016-02-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4718529282 dns-udp-queries-received-ipv6: 316165113 dns-tcp-queries-received-ipv4: 78343151 dns-tcp-queries-received-ipv6: 2869409 dns-udp-responses-sent-ipv4: 4707391640 dns-udp-responses-sent-ipv6: 316007022 dns-tcp-responses-sent-ipv4: 67317812 dns-tcp-responses-sent-ipv6: 302643