1. How computer’s are linked together.
Client Server model
How computer’s are linked together.

2. (Input / output terminals)
Old Computer Architecture
Dumb terminal
The processing takes place within the main frame computer and the terminals are merely input and output devices
Dumb terminal
Dumb terminal
Dumb terminal
Main frame computer
(Input / output terminals)
(Processing)
Client Server model

3. ‘What kind of services are requested from a server?’
client
‘A client is a piece of computer hardware or software that accesses a service made available by a server.’
Requests a service
‘What kind of services are requested from a server?’
Client
Client Server model

4. server Client Server model
‘A server is a running instance of an application (software) capable of accepting requests from the client and giving responses accordingly. Servers can run on any computer including dedicated computers, which individually are also often referred to as "the server".
TELNET
File sharing
Web
File transfer
Server
Proxy
Printer
Client Server model

5. What is client server? Client Server model
‘The client–server model of computing is a distributed application structure that partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients.’
Client – Server Model
Peer – Peer Network
Data transactions
Data transactions
Client
Client
Client
Server
Client
Client Server model

6. Distributed computer model
A server can support many distributed clients (eg file server)
Client
Client
Client
Client
Data transactions
Client
Server
Client
Client
Client
Client Server model

7. Distributed computer model
Clients
Clients
Network B
Network A
Clients
Routers
A server can support many small clusters of computers as shown in the diagram.
Network C
Server
Client Server model

8. Distributed computer model
Clients
Clients
Network A
Network B
There can be many different servers providing different services for multiple networks of clients as shown.
Clients
Routers
Network C
Server
Client Server model

9. Distributed computer model
Clients
Extra services can be provided, such as firewall, proxy, Internet connection, or database management system (DBMS)
Clients
Network A
Network B
File sharing
DBMS
Clients
Routers
Network C
Web
Firewall
Proxy
Internet
Server
Printer
Client Server model

10. Cloud Client – Server Model
‘The practice of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer..’
Cloud Client – Server Model
Remote Client
Internet
Remote Client
Data transactions
Remote Client
Server
Client Server model