--- version: rssac002v3 service: a.root-servers.net start-period: '2019-02-05T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5390475389 dns-udp-queries-received-ipv6: 775473874 dns-tcp-queries-received-ipv4: 150405724 dns-tcp-queries-received-ipv6: 33876325 dns-udp-responses-sent-ipv4: 5268166683 dns-udp-responses-sent-ipv6: 775027350 dns-tcp-responses-sent-ipv4: 145939053 dns-tcp-responses-sent-ipv6: 34556627