--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-05T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4360251097 dns-udp-queries-received-ipv6: 636396120 dns-tcp-queries-received-ipv4: 128467815 dns-tcp-queries-received-ipv6: 30438754 dns-udp-responses-sent-ipv4: 4264336836 dns-udp-responses-sent-ipv6: 635904852 dns-tcp-responses-sent-ipv4: 125364693 dns-tcp-responses-sent-ipv6: 31123994