--- version: rssac002v3 service: a.root-servers.net start-period: '2018-04-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6013860182 dns-udp-queries-received-ipv6: 416709749 dns-tcp-queries-received-ipv4: 115318921 dns-tcp-queries-received-ipv6: 15660371 dns-udp-responses-sent-ipv4: 6007811091 dns-udp-responses-sent-ipv6: 416642380 dns-tcp-responses-sent-ipv4: 115824775 dns-tcp-responses-sent-ipv6: 15702053