--- version: rssac002v3 service: a.root-servers.net start-period: '2019-02-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5600612295 dns-udp-queries-received-ipv6: 819545204 dns-tcp-queries-received-ipv4: 176060690 dns-tcp-queries-received-ipv6: 33982145 dns-udp-responses-sent-ipv4: 5478488019 dns-udp-responses-sent-ipv6: 819102840 dns-tcp-responses-sent-ipv4: 171749796 dns-tcp-responses-sent-ipv6: 33403967