--- service: a.root-servers.net start-period: '2016-03-18T00:00:00Z' end-period: '2016-03-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5443318969 dns-udp-queries-received-ipv6: 350942627 dns-tcp-queries-received-ipv4: 68179072 dns-tcp-queries-received-ipv6: 4421323 dns-udp-responses-sent-ipv4: 5427081787 dns-udp-responses-sent-ipv6: 352316192 dns-tcp-responses-sent-ipv4: 58475807 dns-tcp-responses-sent-ipv6: 276596