P2P: Has no Server, Data is stored on individual clients, Access rights, user names and passwords set on each client, Each client has to be backed up individually, Cheap - as no need to buy a server, Client Server: Has a server - this is expensive, Data is stored on the server and access by the clients, Access rights, usernames and passwords are set on the server, The server is backed up as all data is stored on it, If the server breaks, the network breaks,

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