--- version: rssac002v3 service: a.root-servers.net start-period: '2021-01-28T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6202752337 dns-udp-queries-received-ipv6: 1336003191 dns-tcp-queries-received-ipv4: 290383263 dns-tcp-queries-received-ipv6: 156919936 dns-udp-responses-sent-ipv4: 6015015161 dns-udp-responses-sent-ipv6: 1334529838 dns-tcp-responses-sent-ipv4: 280736690 dns-tcp-responses-sent-ipv6: 157393235