--- service: a.root-servers.net start-period: '2015-04-25T00:00:00Z' end-period: '2015-04-25T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2483001826 dns-udp-queries-received-ipv6: 224886294 dns-tcp-queries-received-ipv4: 18488461 dns-tcp-queries-received-ipv6: 2413896 dns-udp-responses-sent-ipv4: 2473919793 dns-udp-responses-sent-ipv6: 224408008 dns-tcp-responses-sent-ipv4: 15539040 dns-tcp-responses-sent-ipv6: 1959362