--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5001958977 dns-udp-queries-received-ipv6: 1033504816 dns-tcp-queries-received-ipv4: 130445259 dns-tcp-queries-received-ipv6: 27656073 dns-udp-responses-sent-ipv4: 4887899581 dns-udp-responses-sent-ipv6: 1033077735 dns-tcp-responses-sent-ipv4: 126588254 dns-tcp-responses-sent-ipv6: 28202369