Before we have explained how many types of network? First of all need to basic understand what a network is? .A computer network is a telecommunication network which allows computers to exchange data.
A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications.
The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.
The best known computer network is ‘Internet’.
Today networks are the backbone of any business Used for everything from accessing the internet or printing a document to downloading an attachment from an email and etc.
Today we have explained the types of networks what they’re used for. Depending upon the geographical area covered by a network, it is classified as:-
Personal Area Network (PAN)
The smallest and most basic type of network, a PAN is made up of a wireless modem, a computer or two, phones, printers, tablets, etc., and revolves around one person in one building. These types of networks are typically found in small offices or residences, and are managed by one person or organization from a single device.
A PAN is a network that is used for communicating among computers and computer devices (including telephones) in close proximity of around a few meters within a room. It can be used for communicating between the devices themselves, or for connecting to a larger network such as the internet. PAN’s can be wired or wireless. A personal area network (PAN) is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individual’s body. The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters
2. Local Area Network (LAN)
We’re confident that you’ve heard of these types of networks before – LANs are the most frequently discussed networks, one of the most common, one of the simplest types of networks. LANs connect groups of computers and low-voltage devices together across short distances. A LANs is a network that is used for communicating among computer devices, usually within an office building or home.
LAN’s enable the sharing of resources such as files or hardware devices that may be needed by multiple users.LAN is limited in size, typically spanning a few hundred meters, and no more than a mile.LAN is fast, with speeds from 10 Mbps to 10 Gbps.It requires little wiring, typically a single cable connecting to each device.
LAN’s can be either wired or wireless. Twisted pair coaxes or fibre optic cable can be used in wired LAN’s.
Every LAN uses a protocol – a set of rules that governs how packets are configured and transmitted. LAN are linked together with a certain topology. These topologies include
You have also readCommon BIOS Configuration Explained
- Bus consists of a single linear cable called a trunk.
- Data is sent to all computers on the trunk. Each computer examines EVERY packet on the wire to determine who the packet is for and accepts only messages addressed to them.
- Bus is a passive topology.
- Performance degrades as more computers are added to the bus.
- Signal bounce is eliminated by a terminator at each end of the bus.
- Barrel connectors can be used to lengthen cable.
- Repeaters can be used to regenerate signals.
- Usually uses Thinnet or Thicknet
- both of these require 50 ohm terminator
- good for a temporary, small (fewer than 10 people) network
- But its difficult to isolate malfunctions and if the backbone goes down, the entire network goes down.
- Computers are connected on a single circle of cable.
- usually seen in a Token Ring or FDDI (fiber optic) network
- Each computer acts as a repeater and keeps the signal strong => no need for repeaters on a ring topology
- No termination required => because it’s a ring
- Token passing is used in Token Ring networks. The token is passed from one computer to the next, only the computer with the token can transmit. The receiving computer strips the data from the token and sends the token back to the sending computer with an acknowledgment. After verification, the token is regenerated.
- Relatively easy to install, requiring; minimal hardware
- Computers are connected by cable segments to a centralized hub.
- Signal travels through the hub to all other computers.
- Requires more cable.
- If hub goes down, entire network goes down.
- If a computer goes down, the network functions normally.
- most scalable and reconfigurable of all topologies
LANs are capable of very high transmission rates (100s Mb/s to G b/s).
Using routers, LANs can connect to wide area networks (WLANs, explained below) to rapidly and safely transfer data.
3. Wireless Local Area Network (WLAN)
Functioning like a LAN, WLANs make use of wireless network technology, such as Wi-Fi. Typically seen in the same types of applications as LANs, these types of networks don’t require that devices rely on physical cables to connect to the network
4. Wide Area Network (WAN)
A wide area network (WAN) is a network that covers a broad area (i.e., any telecommunications network that links across metropolitan, regional, national or international boundaries) using leased telecommunication lines.WAN covers a large geographic area such as country, continent or even whole of the world. WAN is two or more LANs connected together. The LANs can be many miles apart.
This allows computers and low-voltage devices to be remotely connected to each other over one large network to communicate even when they’re miles apart.
The Internet is the most basic example of a WAN, connecting all computers together around the world. Because of a WAN’s vast reach, it is typically owned and maintained by multiple administrators or the public. So that users and computers in one location can communicate with users and computers in other location
5. Campus Area Network (CAN)
Larger than LANs, but smaller than metropolitan area networks (MANs, explained below), these types of networks are typically seen in universities, large school districts or small businesses. They can be spread across several buildings that are fairly close to each other so users can share resources.
6. Metropolitan Area Network (MAN)
These types of networks are larger than LANs but smaller than WANs – and incorporate elements from both types of networks. A metropolitan area network (MAN) is a large computer network that usually spans a city or a large campus. MANs span an entire geographic area (typically a town or city, but sometimes a campus). A MAN might be owned and operated by a single organization, but it usually will be used by many individuals and organizations. A MAN often acts as a high speed network to allow sharing of regional resources. A MAN typically covers an area of between 5 and 50 km diameter.
Ownership and maintenance is handled by either a single person or company (a local council, a large company, etc.).
Examples of MAN– Telephone company network that provides a high speed DSL to customers and cable TV network.
When MAN is specifically designed for a collage campus, then it is referred to as ‘campus area network’ (CAN).
7. Enterprise Private Network (EPN)
These types of networks are built and owned by businesses that want to securely connect its various locations to share computer resources.
8. Virtual Private Network (VPN)
By extending a private network across the Internet, a VPN lets its users send and receive data as if their devices were connected to the private network – even if they’re not. Through a virtual point-to-point connection, users can access a private network remotely. This usually happens if the VPN connection is used to connect two networks that are in separate locations.
9. Storage-Area Network (SAN)
As a dedicated high-speed network that connects shared pools of storage devices to several servers, these types of networks don’t rely on a LAN or WAN. Instead, they move storage resources away from the network and place them into their own high-performance network. SANs can be accessed in the same fashion as a drive attached to a server. Types of storage-area networks include converged, virtual and unified SANs.
9.1 System-Area Network (also known as SAN)
This term is fairly new within the past two decades. It is used to explain a relatively local network that is designed to provide high-speed connection in server-to-server applications (cluster environments), storage area networks (called “SANs” as well) and processor-to-processor applications. The computers connected on a SAN operate as a single system at very high speeds.
10. Passive Optical Local Area Network (POLAN)
As an alternative to traditional switch-based Ethernet LANs, POLAN technology can be integrated into structured cabling to overcome concerns about supporting traditional Ethernet protocols and network applications such as PoE (Power over Ethernet). A point-to-multipoint LAN architecture, POLAN uses optical splitters to split an optical signal from one strand of single mode optical fiber into multiple signals to serve users and devices.
Passive Optical Local Area Network (POLAN) is making many advantages of optical fiber, it can be higher bandwidth. It is newly structured to replacing old structured cables.
If you have questions about which type of network is right for your organization, or want to learn more about network solutions that improve uptime, maintain security, and help improve user access, check out [email protected]
you have also learn :-
- Basic function of computer system
- Career after Polytechnic Course | Scope after Polytechnic Diploma
- Public got access to Facebook
you find this guide useful?
Let us know in the comments section below!