--- version: rssac002v4 service: a.root-servers.net start-period: '2022-04-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4925236748 dns-udp-queries-received-ipv6: 1424034634 dns-tcp-queries-received-ipv4: 262830253 dns-tcp-queries-received-ipv6: 51352829 dns-udp-responses-sent-ipv4: 4911251137 dns-udp-responses-sent-ipv6: 1430821265 dns-tcp-responses-sent-ipv4: 261095578 dns-tcp-responses-sent-ipv6: 51334669