--- version: rssac002v3 service: a.root-servers.net start-period: '2021-07-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4830900839 dns-udp-queries-received-ipv6: 1282643734 dns-tcp-queries-received-ipv4: 261788759 dns-tcp-queries-received-ipv6: 89553366 dns-udp-responses-sent-ipv4: 4681885291 dns-udp-responses-sent-ipv6: 1280361902 dns-tcp-responses-sent-ipv4: 254425018 dns-tcp-responses-sent-ipv6: 89386091