A computer network, a data communications network, or a computer network is the interconnection of various computer frameworks through a progression of telecommunications devices and a physical medium (wired or remote).
Its capacity is to share data in data bundles. They are transmitted by electrical driving forces, electromagnetic waves, or different methods, utilizing extraordinary encoding. For this, the framework deciphers the procedures of the various computers into a similar language, through a progression of correspondence guidelines.
Computer networks are not unique, in their trade rationale, from other correspondence forms: they have a sender, a recipient, and a message, a method through which to transmit the message and a progression of codes or conventions to ensure their right understanding. Just, for this situation, the individuals who send and get messages are computers.
By having various networked computers, we can make the inner correspondence between them, which likewise serves to share Internet passageways or oversee peripherals, (for example, a printer). Moreover, it permits the quick sending of data and documents without the need to utilize optional capacity devices, (for example, plates or pen-drives).
Networks are available today in pretty much consistent life, particularly those identified with administration or asset management. Actually, the Internet association that we access from our computer, cell phone, or different devices is just an immense network of computers.
Types of computer networks
Local Area Network (LAN):
A network that is constrained to a moderately little unique area, for example, a room, a solitary structure, a boat, or a plane. Local area networks are once in a while called a solitary area network. Note: For authoritative purposes, enormous LANs are commonly partitioned into littler coherent sections called Workgroups. A Workgroups is a gathering of computers that share a typical arrangement of assets inside a LAN.
Metropolitan Area Network (MAN):
A network that associates at least two local area networks together, however, doesn’t stretch out past the prompt city limits, or the metropolitan area. Switches ( switches ) different switches ( Switch ) and the center points are associated with making a MAN.
Wide Area Network (WAN):
is a data communications network that covers a moderately wide geographic area and frequently utilizes the transmission offices gave by basic transporters, for example, telephone organizations. The WAN Technologies by and large work in the lower three layers of the OSI reference model: the physical layer, the data interface layer, and the network layer.
Elements of a computer network
Computer networks contain the accompanying elements:
Servers: Servers are computers that procedure the progression of network data, serving all others, and bringing together control of the network. They work as investigators, at the service of others (henceforth their name). Already they were designated “instructors”.
Clients or workstations: Interconnected computers and not servers, which are a piece of the network and permit access to it. Already they were designated “slaves”.
Transmission medium: The wiring or electromagnetic waves that the network utilizes for the transmission of data, contingent upon the kind of network.
Hardware: Electronic parts that permit the network to be built up, for example, the network cards of every computer, the modems, and switches that help the transmission, or the repeater receiving wires that broaden the remote association.
Software: The projects required to oversee and work the hardware, including the Network Operating System; or correspondence conventions, (for example, TCP and IP).
Advantages of computer networks:
- Quick and proficient correspondence.
- Sharing of programming and equipment, for example, printers or hard drives.
- Cost and time investment funds.
- Possibility of remote management and control of our computer.
- Improves the method of individual and collaboration
- Dynamic refreshing of data.
- Possibility of sharing and trading records, be they pictures, video, or text.
Disadvantages of computer networks:
• Your own data might be presented to individuals attempting to discover blemishes or vulnerabilities in the computer network to attempt to extricate your own data for malignant purposes.
• Operation and upkeep costs.
• If you rely upon the Internet association for school or business exercises, and for some disappointment the computer network fizzles, you can see the outcomes in time, cash, and exertion.