--- service: i.root-servers.net start-period: '2013-11-18T00:00:00Z' end-period: '2013-11-19T00:00:06Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2270324979 dns-udp-queries-received-ipv6: 126447954 dns-tcp-queries-received-ipv4: 5114785 dns-tcp-queries-received-ipv6: 235807 dns-udp-responses-sent-ipv4: 2344116231 dns-udp-responses-sent-ipv6: 137227517 dns-tcp-responses-sent-ipv4: 5131847 dns-tcp-responses-sent-ipv6: 245548