--- version: rssac002v3 service: d.root-servers.net start-period: '2018-12-31T00:00:00Z' end-period: '2018-12-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5950395556 dns-udp-queries-received-ipv6: 1414158313 dns-tcp-queries-received-ipv4: 379054986 dns-tcp-queries-received-ipv6: 41933941 dns-udp-responses-sent-ipv4: 5950431277 dns-udp-responses-sent-ipv6: 1413984826 dns-tcp-responses-sent-ipv4: 378520989 dns-tcp-responses-sent-ipv6: 41913955