This Electronics Engineering Seminar Topic deals with the following:
Wi-Fi, or Wireless Fidelity, is freedom: it allows you to connect to the Internet from your couch at home, a bed in a hotel room or at a conference room at work without wires. How? Wi-Fi is a wireless technology like a cell phone. Wi-Fi enabled computers send and receives data indoors and out: anywhere within the range of a base station. And the best thing of all, it’s fast. In fact, it’s several times faster than the fastest cable modem connection.
However, you only have true freedom to be connected anywhere if your computer is configured with a Wi-Fi CERTIFIED radio (a PC Card or similar device). Wi-Fi certification means that you will be able to connect anywhere there are other Wi-Fi CERTIFIED products-whether you are at home, the office or corporate campus, or in airports, hotels, coffee shops and other public areas equipped with a Wi-Fi access available.
The Wi-Fi certified logo is your only assurance that the product has met rigorous interoperability testing requirements to assure products from different vendors will work together .The Wi-Fi CERTIFIED logo means that it’s a “safe” buy.
Wi-Fi certification comes from the Wi-Fi Alliance, a nonprofit international trade organization that tests 802.11-based wireless equipment to make sure it meets the Wi-Fi standard and works with all other manufacturers’ Wi-Fi equipment on the market .Thanks to the Wi-Fi
Alliance, you don’t have to read the fine print or study technicaljournals:if it says Wi-Fi, it will work.
WIRELESS NETWORKING COMPONENTS
Wi-Fi is a friendly term for IEEE 802.11b Ethernet standard. It operates in the unlicensed frequency band of 2.4 Ghz with a maximum data rate of 11 Mbps.
IEEE 802.11b wireless networking consists of the following components:
A station (STA) is a network node that is equipped with a wireless network device. A personal computer with a wireless network adapter is known as a wireless client. Wireless clients can communicate directly with each other or through a wireless access point (AP). Wireless clients are mobile.
Wireless Access Points
A wireless AP is a wireless network node that acts as a bridge between STAs and a wired network. A wireless AP contains:
- At least one interface that connects the wireless AP to an existing wired network (such as an Ethernet backbone).
- A wireless network device with which it creates wireless connections with STAs.
- IEEE 802.1D bridging software, so that it can act as a transparent bridge between the wireless and wired networks.
The wireless AP is similar to a cellular phone network’s base station. Wireless clients communicate with both the wired network and other wireless clients through the wireless AP. Wireless APs are not mobile and act as peripheral bridge devices that extend a wired network.