Wireless access point pdf

In the network diagram displayed above Figure 1. One being a wired network and the other being a wireless network. The wired network consists of four wired computers to a switch, which is connected to a router. The wireless network in the right portion shows two wireless computers connected to a wireless access point WAP. Since the objective of this post is to show you how to connect a wireless access point to a wired network, I will be explaining the deployment scenario and the technical way to configuring your wireless access point to connect to your existing wired network.

So what is a wired network? The wired network is a common type of wired configuration in that the majority of wired networks makes use of Ethernet cables to transfer data between connected PCs or end devices. In a small office or business wired network, a single router may be tasked to connecting all the computers or end devices.

Larger networks often incorporate multiple routers or switches tasked with interconnecting network segments or devices. It is a popular practice to use one of these devices typically to connect to a cable modem, T1 line, or other types of Internet connection to provide Internet access to all devices connected to the network.

These devices would normally be capable or equipped to perform Network Address Translation to allow all those devices to get to the internet. Wired may also refer to peripheral devices like wired keyboards and mice.

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Shure Web Device Discovery displays all Shure devices featuring embedded web servers on the same network as the computer. Also, they have limitations with their range of operation. When a station is moved out of its range, it suffers from noise and error in the received data due to the poor signal strength.

This working group is IEEE The recommendations of the An increasing number of LAN users are becoming mobile. These mobile users require connectivity to a network, regardless of where they are because they want simultaneous access to the network. With wireless LANs, users can access shared information without looking for a place to plug in their systems and do not need network managers to set up networks to install cable and other equipment.

The wireless network access modes are as follows :. Infrastructure mode : To solve particular problems of providing services from a fixed network to mobile users, an infrastructure wireless LAN is used.

In an infrastructure LAN, there is a central server, operating on a fixed wired network. Portable clients can access the services of the fixed network through access points called Portable Access Units. Figure illustrates the structure of an infrastructure LAN.

Typical range of a PAU is between 50 and meters. They can set up an independent network whenever they are within range of one another. This is called a peer-to-peer or ad hoc network. Such a configuration is required on demand. Such networks require no administration or pre-configuration. In this case, each client would only have access to the resources of the other clients, and not to a central server.

Access points have a finite range, in the order of feet for indoor and feet for outdoors. In a very large facility such as a university or on a college campus, it will probably be necessary to install more than one access point.

Access point positioning is accomplished by means of a site survey. The goal is to plan the coverage area with overlapping coverage cells so that clients might range throughout the area without ever losing network contact.

The ability of clients to move seamlessly among a cluster of access points is called roaming. Access points hand the client off from one to another in a way that is invisible to the client, ensuring unbroken connectivity.

Conferences arranged in a building, or airports, meetings arranged on corporate offices, may need to setup wireless LAN. Wireless LANs offer the following advantages over traditional wired networks. Mobility Users on a wireless LAN systems can access to real-time information from anywhere within their organization.

This mobility supports productivity and service opportunities, which are not possible with wired networks. Fast Installation and Simplicity Installing a wireless LAN system can be fast and easy and can eliminate the need to pull cables through walls, floor, and ceilings.

Installation Flexibility Wireless network is suitable for any kind of geographical conditions. Installation requires to properly setup the transmitter and the receiver antenna RF or infrared system. This is much easier than cable installation of a wired LAN. If a company decided to move to a new location, the wireless system is much easier to move. However, the overall installation expenses and life cycle costs are significantly lower.

Long-term cost benefits are greatest in dynamic environments, requiring frequent moves and changes. Scalability Wireless LAN systems can be configured in a variety of topologies to cater to the need for specific applications and installations. Configurations can be easily changed. They scale well. New nodes can be added to the existing wireless LAN without much degradation of performance. It is best for mobility because there are no wires.

The broader range of transmission : Generally, the signal range of the wireless router is just dozens of meters, and if beyond this range, the signal lost. At this point, an access point can extend signal coverage proportionally, which enables users to communicate freely in the broader wireless network. Flexible networking : In commercial locations, many wireless devices used with different networking patterns that should be adopted based on the environment and requirements.

Multi-AP is interconnection to extend the coverage of wireless networks, so clients to roam seamlessly in the network. High cost : The setup cost of wireless AP is a little bit expensive because, for enterprises wireless network, more wireless APs needed.

Wireless networks high cost but are easy to implant. However the actual challenge comes when we try to secure its signals. Insecure wireless network can be attacked by hackers.

Poor stability : Due to the air as the transmission medium, the network stability is poor in Wireless networks, and it is slower than wired network especially if there are more devices in WLAN, while in the cable network is faster and more stable than a wireless network. The wireless signals blocked by certain obstacles as walls, gates and human beings.

The signal strength depends upon the location;. Less Secure : It is less secure as compare to cable network because you are using radio waves for transmission and someone on the network could sniff traffic.

They are the transmitters and receivers at radio frequency RF or infrared IR. The RF transmitter and receivers need antennas to perform two-way communication. This area requires a wide knowledge about antenna and propagation. Usually a trial installation is carried out before actual implementation.

Hubs, bridges, network operating system , servers, and other components are functioning exactly as they were, on a wired LAN. Mobile Clients. Mobile clients are portable computing devices that act as clients. The following are some of the mobile systems. Laptop computers: Laptop PCs with two-way communication facility Transceiver 2. Portable FAX 4. Cellular phones. Special Units. For network management and efficient communication, a wireless LAN needs additional equipments.

They are:. Communication units: These units perform communications within the network and also with other networks. Data collecting units: These units collect data from other systems.

Security Units: These units take care of the network security. Transceivers: A transceiver is a half-duplex device. It performs transmission and reception of data within a wireless LAN. It can be able to transmit in one direction at a time. Portable bridges : Portable Bridge can support internet working functions. Two wireless LANs can communicate with each other using a bridge. It can be a transceiver or a satellite port or other communication unit that provides a bridge service.

Wireless LANs use electromagnetic waves radio or infrared technology to communicate information from one point to another without relying on any physical connection.

Radio waves are often referred as radio carriers because they simply perform the function of delivering energy to a remote receiver. The data being transmitted is superimposed on the radio carrier so that it can be accurately extracted at the receiving end.

This is generally referred to as modulation of the carrier by the information being transmitted. Once data is superimposed modulated onto the radio carrier, the radio signal occupies more than a single frequency, since the frequency or bit rate of the modulating information adds to the carrier.

Multiple radio carriers can exist in the same space at the same time without interfering with each other if the radio waves are transmitted on different radio frequencies. To extract data, a radio receiver tunes in one radio frequency while rejecting all other frequencies.

The access point receives, buffers, and retransmits data between the wireless LAN and the wired network infrastructure. A single access point can support a small group of users and can function within a range of less than one hundred to several hundred feet.