--- version: rssac002v3 service: a.root-servers.net start-period: '2017-06-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3906134886 dns-udp-queries-received-ipv6: 405110594 dns-tcp-queries-received-ipv4: 172542528 dns-tcp-queries-received-ipv6: 9415246 dns-udp-responses-sent-ipv4: 3896359476 dns-udp-responses-sent-ipv6: 405057002 dns-tcp-responses-sent-ipv4: 172423980 dns-tcp-responses-sent-ipv6: 9526660