--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5024148028 dns-udp-queries-received-ipv6: 1130299436 dns-tcp-queries-received-ipv4: 279873569 dns-tcp-queries-received-ipv6: 54958668 dns-udp-responses-sent-ipv4: 5283429282 dns-udp-responses-sent-ipv6: 1164475184 dns-tcp-responses-sent-ipv4: 276832043 dns-tcp-responses-sent-ipv6: 54870742