--- service: a.root-servers.net start-period: '2015-04-02T00:00:00Z' end-period: '2015-04-02T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2853385525 dns-udp-queries-received-ipv6: 232784233 dns-tcp-queries-received-ipv4: 22133416 dns-tcp-queries-received-ipv6: 3172464 dns-udp-responses-sent-ipv4: 2842202896 dns-udp-responses-sent-ipv6: 232228300 dns-tcp-responses-sent-ipv4: 17815048 dns-tcp-responses-sent-ipv6: 1580527