Referring to the diagram:

(1) what are the main drawbacks of the Client/Server (C/S) architecture?

(2) Compare the 3-tier (B/S) architecture to the C/S architecture, we use the Web server to replace the Server and add the Application Server to the server side. What kind of problems are solved by using this design and how?

(3) Compare the Multi-tier architecture to the B/S architecture, we use a group of Front-end servers to replace the Web Server, and use a group of servers to replace the Application Server at backend. What kind of problems are solved by using this design and how?

Client /Server (C/S) Architecture Client Server 3-tier (B/S) Architecture Client Web Server App Server Multi-tier Architecture Client Server Front-end Client Server Front-end Client Server