WLAN Topologies
WLAN categories

WLANs are access layer elements or products. WLAN products fit into two main categories:

  1. Wireless in-building LANs
  2. Wireless building-to-building bridging

WLANs replace the Layer 1 transmission medium of a traditional wired network, which is usually a Category 5 cable, with radio transmission over the air. WLANs also replace the Layer 2 MAC functionality, with wireless MAC drivers. WLAN products can plug into a wired network and function as an overlay to traditional or wired LANs. WLANs can also be deployed as a standalone LAN, when wired networking is not feasible. WLANs allow the use of desktops, portable computers, and specialty devices in an environment where connection to the network is essential. WLANs are typically within a building, and are used for distances up to 305 m (1000 ft). Properly used WLANs can provide instant access to the network from anywhere in a facility. Users will be able to roam without losing their network connections. The Cisco WLAN provides complete flexibility.

Wireless bridges allow two or more networks that are physically separated to be connected on one LAN, without the time or expense of dedicated cables or T1 lines. Examples of wireless bridge applications are shown in Figures and .


Interactive Media Activity

Interactive Activity: Bridged WLANs

This interactive animation demonstrates how WLANs can send messages to each other. Follow the instructions displayed near the bottom of the main window to view the animation.