--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6807862997 dns-udp-queries-received-ipv6: 1351716510 dns-tcp-queries-received-ipv4: 156353312 dns-tcp-queries-received-ipv6: 39912531 dns-udp-responses-sent-ipv4: 6651410179 dns-udp-responses-sent-ipv6: 1328211084 dns-tcp-responses-sent-ipv4: 148867512 dns-tcp-responses-sent-ipv6: 36127015