--- version: rssac002v3 service: a.root-servers.net start-period: '2019-05-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5751500306 dns-udp-queries-received-ipv6: 906869524 dns-tcp-queries-received-ipv4: 208808525 dns-tcp-queries-received-ipv6: 29318648 dns-udp-responses-sent-ipv4: 5617010530 dns-udp-responses-sent-ipv6: 906254502 dns-tcp-responses-sent-ipv4: 204777751 dns-tcp-responses-sent-ipv6: 30116869