Telecommunication & Networking - Client Server Networks : Disadvantages for the latter.

Disadvantages

1)  Congestion in Network :Too many requests from the clients may lead to congestion, which rarely takes place in P2P network. Overload can lead to breaking-down of servers. In peer-to-peer, the total bandwidth of the network increases as the number of peers increase.

 
2)  Client-Server architecture is not as robust as a P2P and if the server fails, the whole network goes down. Also, if you are downloading a file from server and it gets abandoned due to some error, download stops altogether. However, if there would have been peers, they would have provided the broken parts of file. 

3) Cost : It is very expensive to install and manage this type of computing.

4) You need professional IT people to maintain the servers and other technical details of network.

5) If the server goes down, it takes part or the whole network with it.

6) It is more expensive to install.

7) Needs to be maintaned by staff with high IT skills.