--- service: a.root-servers.net start-period: '2015-10-18T00:00:00Z' end-period: '2015-10-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2770496438 dns-udp-queries-received-ipv6: 219886168 dns-tcp-queries-received-ipv4: 20043017 dns-tcp-queries-received-ipv6: 4718854 dns-udp-responses-sent-ipv4: 2777604346 dns-udp-responses-sent-ipv6: 218866955 dns-tcp-responses-sent-ipv4: 17232676 dns-tcp-responses-sent-ipv6: 3814321