1. Client Server Network Model:
Def: 
It is the network model in which there is at least one computer with the server operating known as domain controller for sharing the same directory database and other computers are configured as the clients.

2. Features of Client Server Model:
There is at least one domain controller (NT Server/Windows 2000 Advanced Server)
The role of each computer as a client or server is predefined
The user can logon on to network from any computer
Centralized Directory database
Centralized Security Model
Security can be implemented on users rather than on resources
Large network

3. Adv of Client Server Network
Greater Reliance
Scalability
Shared program & Data
Shared workload
Shared Peripherals

4. Advantages of Client/Server Network:
Greater Reliance
Scalability
Shared Program and data
Shared Workload
Shared Peripheral
Data globalization
Support client/Server Architecture

5. Peer- to- Peer Network:
Def:
It is the network model in which every computer on the network is configured as the member of one or more workgroup for sharing file, print services.

6. There is client operating system on all computers
Features: 
There is client operating system on all computers
The role of each computer as a client or server is defined according to the use of resources
The user can logon to the network from the computer on which its user acct has been created
Distributed directory database
Small scale network (less than 10)
Security is implemented on resources rather than on users.

7. File Server
Def:
File Server is a powerful enough computer used for multiple user requests and providing the adequate storage requirements.
 Types of Files Server:
 Low end File Server (approx 6-10 user for running WP and DB)
Mid Range File Server (10-30 Users)
High end File server/Enterprise Server( users)
( transaction processing & Accounting System)