--- version: rssac002v3 service: a.root-servers.net start-period: '2021-07-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5876903724 dns-udp-queries-received-ipv6: 1403179429 dns-tcp-queries-received-ipv4: 297218657 dns-tcp-queries-received-ipv6: 108308895 dns-udp-responses-sent-ipv4: 5707332430 dns-udp-responses-sent-ipv6: 1400522568 dns-tcp-responses-sent-ipv4: 288846583 dns-tcp-responses-sent-ipv6: 108123334