--- service: a.root-servers.net start-period: '2016-01-17T00:00:00Z' end-period: '2016-01-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4474711289 dns-udp-queries-received-ipv6: 299294679 dns-tcp-queries-received-ipv4: 51454984 dns-tcp-queries-received-ipv6: 2011749 dns-udp-responses-sent-ipv4: 4471876709 dns-udp-responses-sent-ipv6: 299707873 dns-tcp-responses-sent-ipv4: 44063318 dns-tcp-responses-sent-ipv6: 281596