--- service: a.root-servers.net start-period: '2015-05-23T00:00:00Z' end-period: '2015-05-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2721420430 dns-udp-queries-received-ipv6: 200505005 dns-tcp-queries-received-ipv4: 17478615 dns-tcp-queries-received-ipv6: 2813235 dns-udp-responses-sent-ipv4: 2751867316 dns-udp-responses-sent-ipv6: 203280071 dns-tcp-responses-sent-ipv4: 15293941 dns-tcp-responses-sent-ipv6: 2065066