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Forum Moderators: phranque
If you want separate IP addresses for each host (subdomain) there is no way of getting around needing 10 IP addresses.
At the hardware level, each computer connected to the net at any given time has a unique IP address. All of the packets of data scurrying around the net contain an IP address only and they are routed from computer to computer based on the IP. The DNS name gets assigned (for human convienence) AFTER the packets reach their final destination.