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LAN stands for Local Area Network, WAN stands for Wide Area Network and MAN stands for Metropolitan Area Network. All the technologies are mainly used for data communication. Covers distance upto 100-1000meters. The figure-1 below depicts all the three network topologies viz. LAN, MAN and WAN. LAN LAN has smaller coverage range within the house or office premises or can at least connect from one building to the nearby building.  Most of the LANs usually will have about 10 to 100 users.  Multiple users in LAN time share the system. LAN has been developed to allow sharing of common resource such as printer,harddisk and modem to more than one PCs.  In this scenario PC connected with common resource is called as controller through which all the users will access the resource.  As the days evolve people started using LAN for e-mail system for corporate network, here one system is configured as server storing mail boxes of all the users. Latest advancement in the LAN t

Types of Network Topology Network Topology is the schematic description of a network arrangement, connecting various nodes(sender and receiver) through lines of connection. BUS Topology Bus topology is a network type in which every computer and network device is connected to single cable. When it has exactly two endpoints, then it is called  Linear Bus topology . Features of Bus Topology It transmits data only in one direction. Every device is connected to a single cable Advantages of Bus Topology It is cost effective. Cable required is least compared to other network topology. Used in small networks. It is easy to understand. Easy to expand joining two cables together. Disadvantages of Bus Topology Cables fails then whole network fails. If network traffic is heavy or nodes are more the performance of the network decreases. Cable has a limited length. It is slower than the ring topology. RING Topology It is called ring topology be

Intranet A n intranet is a private  network  that can only be accessed by authorized users. The prefix "intra" means "internal" and therefore implies an intranet is designed for internal communications. "Inter" (as in Internet) means "between" or "among." Since there is only one Internet, the word "Internet" is capitalized. Because many intranets exist around the world, the word "intranet" is lowercase. Some intranets are limited to a specific local area network ( LAN ), while others can be accessed from remote locations over the  Internet . Local intranets are generally the most secure since they can only be accessed from within the network. In order to access an intranet over a wide area network ( WAN ), you typically need to enter  login credentials. Intranets serve many different purposes, but their primary objective is to facilitate internal communication. For example, a business may create an

WHAT IS INTERNET? The Internet, sometimes called simply "the Net," is a worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers). It was conceived by the Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 and was first known as the  ARPANet . The original aim was to create a network that would allow users of a research computer at one university to "talk to" research computers at other universities. A side benefit of ARPANet's design was that, because messages could be routed or rerouted in more than one direction, the network could continue to function even if parts of it were destroyed in the event of a military attack or other disaster. How does the Internet work?       At this point you may be wondering,  how does the Internet work?  The exact answer is p