The two advantages that a client-server system using a LAN possesses over a big timesharing system are;
It is probably cheaper; It provides more computing power and better interactive interfaces.
The Local Area Network (LAN model) is one that could be grown incrementally. Now, if the LAN is just a long cable, then it means that it cannot be brought down by a single failure if the servers are replicated.
Some of the advantages LAN possesses over big timesharing system are;
Finally, in big timesharing system the client will be limited to using just that server but in LAN different servers can be used.
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