LAN Network-local area network
Previously we read About What Is Networking ? and Advantages of computer networking , Networks based on Requirement and Modes of transmission in Networking ,Types of Devices in Network in this post we Study about LAN in Networking
LAN Network
LAN or Local Area Network connects network devices in such a way that personal computer and workstations can share data, tools and programs. The group of computers and devices are connected together by a switch, or stack of switches, using a private addressing scheme as defined by the TCP/IP protocol.
LAN comprises
A LAN comprises cables, access points, switches, routers, and other components that enable devices to connect to internal servers, web servers, and other LANs via wide area networks.
The rise of virtualization has also fueled the development of virtual LANs, which enable network administrators to logically group network nodes and partition their networks without a need for major infrastructure changes.
Characteristics of LAN
Here are important characteristics of a LAN network:
1. It is a private network, so an outside regulatory body never controls it.
2. LAN operates at a relatively higher speed compared to other WAN systems.
3. There are various kinds of media access control methods like token ring and ethernet.
4. LANs are private owned-network, can be extended up to a few kilometers.
5. It connects computers within a single office, building, block or campus, i.e. they work in a relatively small geographical area.
Advantages of LAN
1.Resource Sharing: LAN provides resource sharing such as computer resources like printers, scanners, modems, DVD-ROM drives, and hard disks can be shared within the connected devices. This reduces cost and hardware purchases.
2. Software Applications Sharing: In a Local Area Network, it is easy to use the same software in a number of computers connected to a network instead of purchasing the separately licensed software for each client a network.
3. Easy and Cheap Communication: Data and messages can easily be shared with the other computer connected to the network.
4. Centralized Data: The data of all network users can be stored on a hard disk of the central/server computer. This help users to use any computer in a network to access the required data.
5.Data Security: Since data is stored on the server computer, it will be easy to manage data at only one place and the data will be more secure too.
6.. Internet Sharing: Local Area Network provides the facility to share a single internet connection among all the LAN users. In school labs and internet Cafes, single internet connection is used to provide internet to all connected computers.
Disadvantages of LAN
1.High Setup Cost: The initial setup costs of installing Local Area Networks is high because there is special software required to make a server. Also, communication devices like an ethernet cable, switches, hubs, routers, cables are costly.
2. Privacy Violations: The LAN administrator can see and check personal data files of each and every LAN user. Moreover, he can view the computer and internet history of the LAN user.
3.Data Security Threat: Unauthorised users can access important data of an office or campus if a server hard disk is not properly secured by the LAN administrator.
4. LAN Maintenance Job: Local Area Network requires a LAN Administrator because there are problems such as software installations, program faults or hardware failures or cable disturbances in Local Area Network. A LAN Administrator is required to maintain these issues.
5. Covers Limited Area: LANs are restricted in size they cover a small area like a single office, single building or a group of nearby buildings.
Note :- In next post we will Study about ...Network Topology .
thank your for reading this post , if you have any Query Must Comment on this page , we will try to solve your query as soon as possible . :- BD Academy ( Raj kamal )
0 Comments