--- version: rssac002v3 service: a.root-servers.net start-period: '2019-04-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5939191674 dns-udp-queries-received-ipv6: 900006208 dns-tcp-queries-received-ipv4: 178408694 dns-tcp-queries-received-ipv6: 29976845 dns-udp-responses-sent-ipv4: 5815316008 dns-udp-responses-sent-ipv6: 899393611 dns-tcp-responses-sent-ipv4: 175739450 dns-tcp-responses-sent-ipv6: 30432605