Wireless networks come in many different forms, cover various distances, and provide a range of low to high bandwidth depending on the type installed. Wireless LAN – Wireless LAN enable Laptop users to access the Network of a company.
Basic Wireless Devices
- Wireless Access Points
- Wireless Network Interface Card (WNIC)
- Wireless Antennas
Wireless Access Points
In the wireless networks, you’ll find a central component such as a switch that’s there to connect hosts together and allow them to communicate with each other.
Only that device is known as a wireless access point (AP) instead.
Wireless Network Interface Card (WNIC)
Every host you want to connect to a wireless network needs a wireless network interface card (WNIC) to do so. Basically, a wireless NIC does the same job as a traditional Ethernet NIC, only instead of having a socket/port to plug a cable into; the wireless NIC has a radio antenna. It would be difficult to buy a laptop today without a wireless card already built in.
Wireless antennas work with both transmitters and receivers. There are two broad classes of antennas on the market today: omnidirectional (or). Wireless access points have at least one antenna. Usually there’s two for better reception (referred to as diversity) and an Ethernet port to connect them to a wired network.
Wireless Standards (The 802.11 Standards)
|Standard||Speed||Frequency (GHZ)||Segment Length|
|802.11b||11 Mbps||2.4||150 to 350 m|
|802.11a||54 Mbps||5||75 to 175 m|
|802.11g||54 Mbps||2.4||100 to 300 m|
|802.11n||74 Mbps||2.4/5||250 to 300 m|