--- service: i.root-servers.net start-period: '2016-05-15T00:00:00Z' end-period: '2016-05-16T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 9684714848 dns-udp-queries-received-ipv6: 622539865 dns-tcp-queries-received-ipv4: 25039297 dns-tcp-queries-received-ipv6: 931199 dns-udp-responses-sent-ipv4: 9647242727 dns-udp-responses-sent-ipv6: 629154557 dns-tcp-responses-sent-ipv4: 24743833 dns-tcp-responses-sent-ipv6: 942216