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BDC5eChapter11 - Chapter 11 Wireless LANs Business Data...

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Chapter 11: Wireless LANs Business Data Communications, 5e
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Business Data Communications, 5e 2 Wireless LAN Applications LAN extension Cross-building interconnect Nomadic access Ad hoc networks
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Business Data Communications, 5e 3 LAN extension Originally targeted to reduce cost of wiring, but new buildings now have sufficient wiring in place Still useful in buildings where wiring is problematic buildings with large open areas, historical buildings with insufficient twisted pair small offices wired LANs are not economical Typically, a wireless LAN will be linked into a wired LAN on the same premises
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Business Data Communications, 5e 4 Single-Cell Wireless LAN
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Business Data Communications, 5e 5 Cross-building interconnect Connect LANs in nearby buildings, be they wired or wireless LANs Point-to-point wireless link is used between two buildings (e.g. two microwave or infrared transmitter/receiver units can be placed on the rooftops of two buildings within the line of sight of each other) Devices are typically bridges or routers.
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Business Data Communications, 5e 6 Nomadic Access Provides a wireless link between a LAN hub and a mobile data terminal (e.g. laptop computer) Examples Enable an employee returning from a trip to transfer data from a personal portable computer to a server in the office. Access in an extended environment such as a campus or a business operating out of a cluster of buildings. In both of these cases, users may wish access to the servers on a wired LAN from various locations
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Business Data Communications, 5e 7 Ad hoc networks A peer-to-peer network (no centralized server) set up temporarily to meet some immediate need For example, a group of employees, each with a laptop or palmtop computer, may convene in a conference room for a business or classroom meeting. The employees link their computers in a temporary network just for the duration of the meeting
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Business Data Communications, 5e 8 Wireless LAN Requirements
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BDC5eChapter11 - Chapter 11 Wireless LANs Business Data...

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