--- service: a.root-servers.net start-period: '2016-03-31T00:00:00Z' end-period: '2016-03-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5586684149 dns-udp-queries-received-ipv6: 371235837 dns-tcp-queries-received-ipv4: 93039517 dns-tcp-queries-received-ipv6: 3272721 dns-udp-responses-sent-ipv4: 5562211340 dns-udp-responses-sent-ipv6: 372144761 dns-tcp-responses-sent-ipv4: 68629929 dns-tcp-responses-sent-ipv6: 276993