When two or more computers are involved, accurate time keeping is difficult, especially if they are not in the same physical location.  A dedicated time server inside your network perimeter is the most accurate, reliable and secure way to ensure accurate timekeeping for all computers on your network.  Accurate timekeeping is necessary to support eBusiness and other applications such as Stock Trades, Logs, B2B Transactions, File Operations, Packet Time Stamps, Software Configuration Management, Database Accuracy, Telecommunication Call Billing, etc.  For a more detailed response to this question click here.