Logical Classification of Networks and Servers

A network can be divided into two categories. 

1) Peer-to-Peer. 

1) Peer-to-Peer. A Peer-to-Peer network has no dedicated servers. Here a number of workstations are connected together for the purpose of sharing information or devices. All the workstations are considered as equal. Any one computer can act as client or server at any instance. This network is ideal for small networks where there is no need for dedicated servers, like home network or small business establishments or shops. The Microsoft term for peer-to-peer network is “Workgroup”. Typically a workgroup contain less than 10 workstations. Normal workstation operating systems are Windows 95/98, ME, XP, NT Workstation, 2000 professional, Vista, RHEL Workstation etc.

2) Client-Server.

2) Client-Server. The client/server model consists of high-end servers serving clients continuously on a network, by providing them with specific services upon request.

 The classifications for servers are

File Server:-

File server, can be used to store the client documents and files centrally. An ideal file server should have large amount of memory, fast hard-disks, multiple processors, fast network adapters, redundant power supplies etc.

Print Servers:-

Print server, which redirects print jobs from clients to specific printers.

Application Servers:-

Application server, which allows clients to run certain programs on the server, and enables multiple users to common applications across the network. Typically Application Servers run business logic. Which means, every business is different and the Application Server is the Server Software which controls the business process. Examples for Application Servers are SAP BASIS, WebLogic, WebSphere etc.

Database Servers:-

Database server, which allows authorized clients to view, modify and/or delete data in a common database. Examples of Database Management Systems are Oracle 8i/9i/10g, MS SQL Server 2000/2005/2008, DB2, MySQL etc.

Directory Servers:-

Directory Servers, which allows the central administration of users and resources. Examples of Directory Servers are Active Directory, NDS (Novell Directory Services), Fedora Directory Server, openLDAP etc.