--- version: rssac002v3 service: a.root-servers.net start-period: '2021-05-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5751552899 dns-udp-queries-received-ipv6: 1264435428 dns-tcp-queries-received-ipv4: 298264016 dns-tcp-queries-received-ipv6: 111094655 dns-udp-responses-sent-ipv4: 5714364921 dns-udp-responses-sent-ipv6: 1289520422 dns-tcp-responses-sent-ipv4: 286795178 dns-tcp-responses-sent-ipv6: 111282043