hi guys i need advice on implementing DNS Server. example situation: * there is a company named foo.com and they host the there dns records to ultradns.com. they have offices in US and JAPAN. in US they have servers: [name like pc1.foo.com,pc2.foo.com..] which are serving the svn repository,company websites and others.. questions: - i want make a DNS server to delegate the subdomain record like us.foo.com so that the public servers in US will look like: pc1.us.foo.com,pc2.us.foo.com and etc. - how about their internal network, should i build a another dns server for the internal network to host for: employee1.us.foo.com any advice.?thanks!