--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6325940584 dns-udp-queries-received-ipv6: 864832411 dns-tcp-queries-received-ipv4: 183633020 dns-tcp-queries-received-ipv6: 35715590 dns-udp-responses-sent-ipv4: 6197220290 dns-udp-responses-sent-ipv6: 864254782 dns-tcp-responses-sent-ipv4: 179839854 dns-tcp-responses-sent-ipv6: 33176952