--- version: rssac002v3 service: a.root-servers.net start-period: '2021-01-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5160391264 dns-udp-queries-received-ipv6: 1080674136 dns-tcp-queries-received-ipv4: 264592407 dns-tcp-queries-received-ipv6: 108888623 dns-udp-responses-sent-ipv4: 4990816034 dns-udp-responses-sent-ipv6: 1078737266 dns-tcp-responses-sent-ipv4: 255721325 dns-tcp-responses-sent-ipv6: 109202896