--- service: a.root-servers.net start-period: '2015-12-02T00:00:00Z' end-period: '2015-12-02T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4435630083 dns-udp-queries-received-ipv6: 335883335 dns-tcp-queries-received-ipv4: 37238711 dns-tcp-queries-received-ipv6: 2185577 dns-udp-responses-sent-ipv4: 4415665872 dns-udp-responses-sent-ipv6: 335178948 dns-tcp-responses-sent-ipv4: 32124203 dns-tcp-responses-sent-ipv6: 276179