--- version: rssac002v4 service: j.root-servers.net start-period: '2021-12-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5950299970 dns-udp-queries-received-ipv6: 1397008333 dns-tcp-queries-received-ipv4: 425024971 dns-tcp-queries-received-ipv6: 67229367 dns-udp-responses-sent-ipv4: 5509475505 dns-udp-responses-sent-ipv6: 1356702927 dns-tcp-responses-sent-ipv4: 280924969 dns-tcp-responses-sent-ipv6: 64645402