--- service: a.root-servers.net start-period: '2016-03-12T00:00:00Z' end-period: '2016-03-12T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3939135226 dns-udp-queries-received-ipv6: 350192511 dns-tcp-queries-received-ipv4: 31892199 dns-tcp-queries-received-ipv6: 3947224 dns-udp-responses-sent-ipv4: 3926687896 dns-udp-responses-sent-ipv6: 351422489 dns-tcp-responses-sent-ipv4: 27744413 dns-tcp-responses-sent-ipv6: 283103