--- version: rssac002v3 service: m.root-servers.net start-period: '2019-04-11T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3785643293 dns-udp-queries-received-ipv6: 680312593 dns-udp-responses-sent-ipv4: 3503915847 dns-udp-responses-sent-ipv6: 638399123 dns-tcp-queries-received-ipv4: 167295540 dns-tcp-queries-received-ipv6: 44199528 dns-tcp-responses-sent-ipv4: 166870689 dns-tcp-responses-sent-ipv6: 44296978