--- service: a.root-servers.net start-period: '2015-09-29T00:00:00Z' end-period: '2015-09-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3284122759 dns-udp-queries-received-ipv6: 266656059 dns-tcp-queries-received-ipv4: 20937387 dns-tcp-queries-received-ipv6: 9170575 dns-udp-responses-sent-ipv4: 3283175901 dns-udp-responses-sent-ipv6: 264825270 dns-tcp-responses-sent-ipv4: 17719954 dns-tcp-responses-sent-ipv6: 7443585