--- version: rssac002v3 service: a.root-servers.net start-period: '2019-02-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5464654363 dns-udp-queries-received-ipv6: 815142915 dns-tcp-queries-received-ipv4: 173186978 dns-tcp-queries-received-ipv6: 33496567 dns-udp-responses-sent-ipv4: 5341789237 dns-udp-responses-sent-ipv6: 814706244 dns-tcp-responses-sent-ipv4: 168820348 dns-tcp-responses-sent-ipv6: 33956297