WLAN is on everyone’s lips and is presented by the sellers as a real highlight of communication, bringing enormous advantages.
Easy Accessibility Even On The Go
The wifi network can be used even on the move. Its mobility is one of its advantages. Wifi gives visitors access to connect to a network of a company or a public place. To access the Internet, all you have to do is bring your laptop to a home with a wifi network. However, it is essential to have authorization before accessing it. The hard part is determining the coverage area. The restriction or extension of a wifi coverage depends mainly on the network owner. It is determined according to the users authorized to use the connection.
What Is Wifi?
Wireless Internet access via WLAN has become an integral part of everyday life and work. But what does “WLAN” actually mean? How does it work? And is surfing via WLAN safe?
Advantages
Extension Of Networks
To expand an existing network, costly rewiring is usually necessary. A grid can be quickly developed by integrating WLAN components (access points) into the existing network structure. In this way, for example, house networks from nearby buildings can be networked without laying cables on the ground between the houses.
Scaling Of Users
A side effect of the network expansion is, at the same time, a scaling option for users because when companies expand, the number of employees usually increases. These new employees can be integrated into the existing company network at short notice via WLAN.
Meetings
Many companies do not have meeting rooms that are fully integrated into the network that can be used. In such cases, ad-hoc meetings (with notebooks) can be set up via WLAN to access the network during the session.
Building Protection
Many buildings are under monument protection. Structural changes such as cable ducts and pipe drillings are impossible in these houses. To set up a network in such dwellings, WLAN is a fast and inexpensive option since no structural changes are necessary.
Temporary Networks
WLAN is very well suited for setting up temporary networks, usually required at trade fairs. As with brief meetings, ad-hoc networks can be set up that only exist for the time of the trade fair.
Hot Spots
A public network can be made available at general points/facilities such as airports, hotels, and restaurants using hotspots. The Internet can be accessed at these locations, for example, to call up emails or to dial into the company network via the Internet. In addition to the advantages shown, WLAN also has disadvantages, leading to a decision favoring WLAN being reconsidered.
Disadvantages
Transmission Speed
The transmission speed of WLAN depends on various factors. One of the factors is the number of users who share a radio cell. The rule here is that the users have to share the transmission speed. With a large number of users, this is quickly noticeable.
Example
Network with one access point and 11 users. The 802.11b standard has a transfer rate of 11 Mbit/s , so the 11 users share the 11 Mbit/s = 1 Mbit/s gross per user
Net Bandwidth
Another factor is the network bandwidth because the net and gross rates are sometimes far apart. These transmission rates are theoretical values. In practice, the bandwidths achieved are usually far below the theoretical values.
Radio Interference
Another disadvantage is radio interference. WLAN uses the public air interface, which is also used by many other devices. For example, wireless boxes, wireless central locking, microwaves, etc., can disrupt the WLAN network and, in the worst case, even bring the network to a standstill. In addition, attention must be paid to structural conditions such as steel girders or metal struts so that the WLAN network works properly. Before users use WLAN, they should check whether their ideas can be implemented.
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