--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4917661167 dns-udp-queries-received-ipv6: 739371127 dns-tcp-queries-received-ipv4: 211746410 dns-tcp-queries-received-ipv6: 35923391 dns-udp-responses-sent-ipv4: 4805475335 dns-udp-responses-sent-ipv6: 738893605 dns-tcp-responses-sent-ipv4: 216277874 dns-tcp-responses-sent-ipv6: 36781882