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Wireless LAN in Hindi | What is Wireless LAN? - (BCA / B.Tech)

Wireless LAN in Hindi | What is Wireless LAN?

A Wireless LAN (WLAN) is a network that communicates data through a wireless medium (Radio Waves). The main purpose of a WLAN is to provide internet or local network facility using wireless technology, so that devices do not require cables.
This is a very popular technology nowadays and is used in various places like homes, offices, schools, and public places. The most common and popular example of a WLAN is Wi-Fi.

Wireless LAN (WLAN) is an important and widespread technology of today, which makes the world of networking simple and convenient. Due to its flexibility, convenience, and easy scalability, it is used in all types of environments,
whether it is a home, office, or public place. Although it has some challenges like security and signal limitations, these can be solved by using the right protocols and technologies.
WLAN has completely changed the experience of modern internet connectivity and has made it more accessible and simple.

Introduction of WLAN in Hindi | Introduction to WLAN:

A WLAN is a type of Local Area Network (LAN), but it uses radio waves to connect devices as compared to wired networks. In a traditional LAN, computers and other devices are connected to the network using cables, whereas in a WLAN, devices are connected wirelessly. This provides more flexibility in network setup and device connectivity.

Some of the main components of a WLAN are:

Wireless Access Points (WAP): This is a device that provides the facility for wireless devices to connect to the network. It is a type of hub that transmits data between wireless devices.
Wireless Network Interface Card (NIC): This is a hardware component present in every device that connects the device to the wireless network.
Router: This is an important component of the network that routes data between different devices and connects them to the internet.
Client Devices: These are the devices that use the WLAN, such as laptops, smartphones, tablets, printers, etc.

Types of WLAN in Hindi | Types of WLAN:

WLAN can be divided into different categories based on their use and area:

1. Infrastructure Mode: This is the most common and popular mode of WLAN. In this, an Access Point (AP) is the center of the network, and all wireless devices (clients) connect to this AP. The Access Point connects the wireless devices together and helps to connect them to a wired network or the internet. This mode is commonly used in large networks like offices, schools, and public places.

2. Ad-hoc Mode: There is no Access Point in Ad-hoc Mode. In this, wireless devices connect directly to each other. This is a peer-to-peer network, in which every device can exchange data with another device. This mode is useful for small and temporary network setups, such as creating a network between two or three laptops.

3. Mesh Network : A Mesh Network has many Access Points, and they are connected to each other. Each Access Point acts as a node, and it shares data with other nodes. If a problem occurs in one node (AP), the other nodes work to send data through an alternative route. This is highly reliable and scalable for large networks, such as smart cities or large campus networks.

Standards of WLAN in Hindi | WLAN Standards:

The IEEE (Institute of Electrical and Electronics Engineers) has set some standards for WLAN, which are known as IEEE 802.11. These standards have evolved over time and provide different types of data speed and range. Some of the main IEEE 802.11 standards are as follows:

1. IEEE 802.11a:

Data Transfer Speed: 54 Mbps
Frequency Band: 5 GHz
Range: Limited (useful for small areas)

2. IEEE 802.11b:

Data Transfer Speed: 11 Mbps
Frequency Band: 2.4 GHz
Range: More, but speed is less

3. IEEE 802.11g:

Data Transfer Speed: 54 Mbps
Frequency Band: 2.4 GHz
Range: Medium

4. IEEE 802.11n:

Data Transfer Speed: Up to 600 Mbps
Frequency Band: 2.4 GHz and 5 GHz (both)
Range: More and speed is also good

5. IEEE 802.11ac:

Data Transfer Speed: Up to 1.3 Gbps
Frequency Band: 5 GHz
Range: Very high and speed is also fast

6. IEEE 802.11ax (Wi-Fi 6):

Data Transfer Speed: Up to 9.6 Gbps
Frequency Band: 2.4 GHz and 5 GHz (both)
Range: Very high, and with maximum speed and capacity

Features of WLAN in Hindi | Features of WLAN:

1. Flexibility: WLAN is a very flexible technology because it provides users with connectivity at any location without the constraint of wires. Users can easily connect to the network from anywhere via laptops, smartphones, or other wireless devices.

2. Convenience: WLAN eliminates the need for cables, which makes network setup and maintenance easy. In addition, devices can be easily moved around and reconnected.

3. Mobility: A major advantage of WLAN is that users can stay connected to the network even while on the move. This increases productivity and they can use their devices anywhere, whether they are in the office or at home.

4. Scalability: A WLAN can be easily expanded into a large network. A large number of users can be connected through additional Access Points or Mesh Networks.

Advantages of WLAN in Hindi | Advantages of WLAN:

No need for wires: There is no need for wires to set up a network through a WLAN, which makes installation simple and cheap.
Easy access: Users can use the network from anywhere, whether they are in the office or at home, as long as they are within the range of the wireless network.
Better network expansion: Expanding a WLAN is easier than a wired network because there is no need to lay wires.
Cost reduction: The elimination of the need for wires reduces the cost of network setup, especially in places where wiring is difficult or expensive.
Limitations of WLAN:
Security: Since data is transmitted wirelessly in a WLAN, it can be intercepted by hackers. Therefore, the use of security standards like WPA2 (Wi-Fi Protected Access 2) is necessary.

Signal range: The signal of a WLAN works only in a limited area. Walls, metal objects, and other obstacles can reduce the strength of the signal.

Data transfer speed: The speed of a wireless network can be less than a wired network, especially when many devices are connected to the network or the signal is weak.

Instability: Environmental conditions, such as rain or other interferences (like microwaves) can affect the wireless signal, which can affect the stability of the network.

Security of WLAN in Hindi | Security of WLAN:

Security is an important topic in WLAN because a wireless medium is used. If the network is not secured, unauthorized users can misuse it. Some of the main security measures are as follows:

WEP (Wired Equivalent Privacy): This is the oldest security protocol of WLAN, but nowadays it is considered weak and is not used.

WPA (Wi-Fi Protected Access): This is an advanced version of WEP, in which better security is provided. However, it can also be weak in some cases.

WPA2: This is an advanced version of WPA and is currently the most popular and secure protocol. It uses AES (Advanced Encryption Standard), which provides more security.

MAC address filtering: In a WLAN network, only those devices can be allowed whose MAC addresses are predetermined by the network administrator.

SSID hiding: The SSID (Service Set Identifier) of an Access Point can be hidden, so that the name of the network is not publicly visible.

Wireless LAN in Hindi | What is Wireless LAN?

Wireless LAN in Hindi | What is Wireless LAN?

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