--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-30T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5097968514 dns-udp-queries-received-ipv6: 815849439 dns-tcp-queries-received-ipv4: 218764254 dns-tcp-queries-received-ipv6: 28623204 dns-udp-responses-sent-ipv4: 4982568417 dns-udp-responses-sent-ipv6: 815397436 dns-tcp-responses-sent-ipv4: 214959711 dns-tcp-responses-sent-ipv6: 28835452