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DNS

1. A multinational company wants to own a domain named 'ifnosys.org'.It queries for it and found that the above domain is free.
2. It also wants that the above domain should have two child domains named 'chat' and 'mail' as its address record.
3. However the company has very few public IP address so it decides to bind all the above three domains to a single IP address.
4. Design and implement the above in your DNS server only,no need to any web hosting.
5. Use any public address of class A. Assume default mask.Please do the required changes in your Linux server IP an Windows PC IP.