--- service: a.root-servers.net start-period: '2015-03-16T00:00:00Z' end-period: '2015-03-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2847742505 dns-udp-queries-received-ipv6: 229952055 dns-tcp-queries-received-ipv4: 22102845 dns-tcp-queries-received-ipv6: 2429847 dns-udp-responses-sent-ipv4: 2843200960 dns-udp-responses-sent-ipv6: 229656076 dns-tcp-responses-sent-ipv4: 19240262 dns-tcp-responses-sent-ipv6: 1518117