--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-28T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5670919395 dns-udp-queries-received-ipv6: 1427193707 dns-tcp-queries-received-ipv4: 296816957 dns-tcp-queries-received-ipv6: 118680893 dns-udp-responses-sent-ipv4: 5500936343 dns-udp-responses-sent-ipv6: 1423997266 dns-tcp-responses-sent-ipv4: 285746946 dns-tcp-responses-sent-ipv6: 118137127