What are the advantages and disadvantages of wireless local area network

Abstract: WLAN is the abbreviation of WirelessLocalAreaNetwork, which refers to the application of wireless communication technology to interconnect computer devices to form a network system that can communicate with each other and realize the resource **** enjoyment. wlan's Chinese name is wireless local area network (WLAN), which has the advantages of convenient installation, easy to expand, easy to carry out the advantages of network planning and adjustments, and the disadvantage is that the network is not stable, and the transmission rate is low. The disadvantages are unstable performance and low transmission rate. Many people often confuse wlan and wifi, so what is the difference between wlan and wifi? The next step is to understand it together. Advantages and disadvantages of wireless LAN

Advantages

1. Flexibility and mobility

In a wired network, the placement of network equipment is limited by the location of the network, while a wireless LAN can access the network from any location within the area covered by the wireless signal. Another great advantage of wireless LANs is their mobility, as users connected to a wireless LAN can move around and stay connected to the network at the same time.

2, easy to install

Wireless LAN can eliminate or minimize the workload of network wiring, generally as long as the installation of one or more access point equipment, you can establish a local area network covering the entire region.

3. Easy network planning and adjustment

For wired networks, a change in office location or network topology usually means rebuilding the network. Rewiring is an expensive, time-consuming, wasteful and trivial process. Wireless LANs can avoid or minimize the above.

4, easy to locate the fault

Wired networks, once a physical failure, especially due to poor line connections and network outages, it is often difficult to identify, and overhaul the lines need to pay a lot of money. Wireless networks, on the other hand, are easy to locate faults, and network connectivity can be restored simply by replacing the faulty device.

5, easy to expand

Wireless LAN has a variety of configurations, you can quickly expand from only a few users of small LANs to thousands of users of large networks, and can provide nodes "roaming" and other wired networks can not be realized characteristics. Because of these advantages, wireless LANs are developing rapidly. In recent years, wireless LANs have been widely used in businesses, hospitals, stores, factories and schools.

Disadvantages

1. Unstable network performance

Wireless LANs rely on radio waves for transmission. These waves are transmitted through wireless transmitters, and buildings, vehicles, trees and other obstacles can impede the transmission of electromagnetic waves, so it can affect the performance of the network.

2. Lower transmission rate

The transmission rate of a wireless channel is much lower compared to a wired channel. The maximum transmission rate of wireless LAN is 1Gbit/s, which is only suitable for personal terminals and small-scale network applications.

3, poor security

In essence, radio waves do not require the establishment of a physical connection channel, the wireless signal is dispersed. Theoretically, it is easy to listen to any signal within the range of radio wave broadcasting, resulting in communication information leakage.

The difference between wlan and wifi

1, written differently

WiFi is generally in the public **** place to provide a kind of wireless network, is a kind of regional, a small part of the existence of the network, such as schools, restaurants and so on and so on. WLAN is a wireless network, which uses wireless technology to connect our computer devices to form a network **** to enjoy the system, to bring benefits to more devices.

2, different coverage

WiFi's scope of application is relatively small, generally in the provisions of a small area, we can search for and use the WiFi, otherwise more than a certain distance, we can not utilize the network, so that the distance is still a requirement. In contrast, WLAN's coverage area is larger, its coverage area is about fifty times more than WiFi, this comparison can be seen, WLAN's applicability is still relatively strong, for the distance of the restriction is not too strong, not too high requirements.

3, the power of the transmitter signal is different

Small range of WiFi is a large range of WLAN included, WiFi's transmitter signal power, small is less than 50 milliwatts, but if the coverage of the range is a little larger, it is to have 80 milliwatts of power. But WLAN's power requirements are a little bit higher. A couple hundred milliwatts for a small one, and maybe more than four hundred milliwatts for a large one.