--- version: rssac002v3 service: a.root-servers.net start-period: '2018-07-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3596513573 dns-udp-queries-received-ipv6: 453546157 dns-tcp-queries-received-ipv4: 116214514 dns-tcp-queries-received-ipv6: 17736333 dns-udp-responses-sent-ipv4: 3500361358 dns-udp-responses-sent-ipv6: 453104107 dns-tcp-responses-sent-ipv4: 113588745 dns-tcp-responses-sent-ipv6: 17799854