Local Area Network

There are basic type of local area network.

1. Peer to Peer
2. Server Based

Peer to Peer-  Peer to Peer network operate with no dedicated server on the network.  Each host functions as both a client and a server.  The user at each host determine what information or peripherals he is willing to share with the other members of the network.  Peer to Peer network generally are related to smaller organizations they do not scale will to larger ones.

Server Based Network-  At least one host is dedicated to server functionality.  Client computer do not share any information with other computer.  All data is stored on the central server .  Most corporate networks are based on this methodology.  Within a server based network, server can play several roles these roles include the following.

Directory Server-  These provide a central directory service for management of users groups and host object to allow for centralized authorization using the central directory.

Files and Print Server-  These provide a secure repository for all data.  They also can  manage point queues that provide access to network.  Searchable print resources.

Application Server-  These provide the server side of client/server application.  In a client/server environment, the client run a small version of the program that allow connectivity to the server.  The server side of the application is used to perform processor- intensive quires on behalf of the client.  Example of application server included Web server and database server.

Mail Server-  These provides electronics message capabilities for the clients of the network.

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A mail server is a program responsible for receiving routing and delivering e-mail message.

Security Server-  These provide security to the local network.  If it is connected to any larger networks such as the internet, security; server include firewalls and proxy servers.

Remote Access Server-  These enalble external data flow to occur between the network, or alternatively, use the technology known as tunneling or virtual private networks (VPNs) to connect to the remote network over a public network such as the internet.