Server Based Networks
A dedicated server is one that functions only as a server and is not used as a client or workstation. Server based networks (see below Figure) have become the standard models for networking.
In a server-based network, clients rely on the services that the server provides, such as file storing and printing. Client computers are generally less powerful than server computers.
A server-based network using network operating system is that the networks are organized into domains. A domain is a collection of networks and clients that share security information. Domain security and logon permissions are controlled by special servers called domain controllers. Users cannot access the resources of servers in a domain until a domain controller has authenticated them.
In server-based networks, a network administrator centrally manages the resource security. The administrator defines and manages user access to network resources.
Another beneficial of server-based networks is central file storage. Server-based networks provide easy backup of critical data. Data backup is another useful characteristic of server based networks.
Server based networks can support a larger number of users than peer-to-peer networks. To support a large number of users, server-based networks use monitoring and network management tools. Servers must perform varied and complex tasks. (See below figure)
Security is often the primary reason for choosing a server-based approach to networking. In a server-based environment, one administrator who sets the policy and applies it to every user on the network can manage security. (see below figure)
Advantages of a client/server network
- Centralized - Resources and data security are controlled through the server.
- Security - More security then Peer-to-peer network.
- Flexibility - New technology can be easily integrated into system.
- Interoperability - All components (client /server) work together.
- Accessibility - Server can be accessed remotely and across multiple platforms.
Disadvantages of a client/server network
- Expense - Requires initial investment in dedicated server.
- Maintenance - Large networks will require a staff to ensure efficient operation.
- Dependence - When server goes down, operations will cease across the network.
click next chapter - Types of network |
