--- version: rssac002v3 service: a.root-servers.net start-period: '2019-09-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6481426728 dns-udp-queries-received-ipv6: 1152333535 dns-tcp-queries-received-ipv4: 203002980 dns-tcp-queries-received-ipv6: 32111989 dns-udp-responses-sent-ipv4: 6303474721 dns-udp-responses-sent-ipv6: 1151801328 dns-tcp-responses-sent-ipv4: 198101368 dns-tcp-responses-sent-ipv6: 32810793