--- service: a.root-servers.net start-period: '2015-01-30T00:00:00Z' end-period: '2015-01-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2986628483 dns-udp-queries-received-ipv6: 220504506 dns-tcp-queries-received-ipv4: 15946867 dns-tcp-queries-received-ipv6: 2138384 dns-udp-responses-sent-ipv4: 2986436558 dns-udp-responses-sent-ipv6: 220330294 dns-tcp-responses-sent-ipv4: 14445877 dns-tcp-responses-sent-ipv6: 1482077