--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5925564861 dns-udp-queries-received-ipv6: 1049131606 dns-tcp-queries-received-ipv4: 163017820 dns-tcp-queries-received-ipv6: 30994900 dns-udp-responses-sent-ipv4: 5794579394 dns-udp-responses-sent-ipv6: 1048614572 dns-tcp-responses-sent-ipv4: 159373863 dns-tcp-responses-sent-ipv6: 31672168