--- service: a.root-servers.net start-period: '2015-06-14T00:00:00Z' end-period: '2015-06-14T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2499240821 dns-udp-queries-received-ipv6: 198553959 dns-tcp-queries-received-ipv4: 15982860 dns-tcp-queries-received-ipv6: 7812039 dns-udp-responses-sent-ipv4: 2524866644 dns-udp-responses-sent-ipv6: 200860919 dns-tcp-responses-sent-ipv4: 13782651 dns-tcp-responses-sent-ipv6: 6842583