--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6232318232 dns-udp-queries-received-ipv6: 808998523 dns-tcp-queries-received-ipv4: 225971685 dns-tcp-queries-received-ipv6: 35928561 dns-udp-responses-sent-ipv4: 6084055214 dns-udp-responses-sent-ipv6: 808271324 dns-tcp-responses-sent-ipv4: 222213837 dns-tcp-responses-sent-ipv6: 33714172