--- service: a.root-servers.net start-period: '2015-08-18T00:00:00Z' end-period: '2015-08-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3686847692 dns-udp-queries-received-ipv6: 195750211 dns-tcp-queries-received-ipv4: 19895400 dns-tcp-queries-received-ipv6: 8648579 dns-udp-responses-sent-ipv4: 3948711907 dns-udp-responses-sent-ipv6: 202191040 dns-tcp-responses-sent-ipv4: 16446641 dns-tcp-responses-sent-ipv6: 7059083