--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-30T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5547338260 dns-udp-queries-received-ipv6: 1259018288 dns-tcp-queries-received-ipv4: 156846962 dns-tcp-queries-received-ipv6: 31016069 dns-udp-responses-sent-ipv4: 5424817225 dns-udp-responses-sent-ipv6: 1257859279 dns-tcp-responses-sent-ipv4: 153787226 dns-tcp-responses-sent-ipv6: 31585961