--- service: a.root-servers.net start-period: '2016-03-01T00:00:00Z' end-period: '2016-03-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4453120464 dns-udp-queries-received-ipv6: 374743031 dns-tcp-queries-received-ipv4: 28147396 dns-tcp-queries-received-ipv6: 3620670 dns-udp-responses-sent-ipv4: 4438796673 dns-udp-responses-sent-ipv6: 375998374 dns-tcp-responses-sent-ipv4: 24141650 dns-tcp-responses-sent-ipv6: 271627