--- version: rssac002v3 service: a.root-servers.net start-period: '2021-02-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5188543744 dns-udp-queries-received-ipv6: 1037826740 dns-tcp-queries-received-ipv4: 276120385 dns-tcp-queries-received-ipv6: 101890920 dns-udp-responses-sent-ipv4: 5013872979 dns-udp-responses-sent-ipv6: 1036433624 dns-tcp-responses-sent-ipv4: 264177749 dns-tcp-responses-sent-ipv6: 102375698