--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5263338128 dns-udp-queries-received-ipv6: 1069740056 dns-tcp-queries-received-ipv4: 135047313 dns-tcp-queries-received-ipv6: 28050507 dns-udp-responses-sent-ipv4: 5147501867 dns-udp-responses-sent-ipv6: 1069328754 dns-tcp-responses-sent-ipv4: 130860728 dns-tcp-responses-sent-ipv6: 28645912