--- version: rssac002v3 service: a.root-servers.net start-period: '2018-12-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4245683909 dns-udp-queries-received-ipv6: 730285672 dns-tcp-queries-received-ipv4: 127630305 dns-tcp-queries-received-ipv6: 29894442 dns-udp-responses-sent-ipv4: 4152704690 dns-udp-responses-sent-ipv6: 729040290 dns-tcp-responses-sent-ipv4: 125099107 dns-tcp-responses-sent-ipv6: 30113928