Page 20 - DCAP311_DCAP607_WIRELESS_NETWORKS

Wireless Networks

Notes the bottom two levels the ISO model, the physical layer and link layer (see figure below). Any
LAN application, network operating system, protocol, including TCP/IP and Novell NetWare,
will run on an 802.11-compliant WLAN as easily as they run over Ethernet.

Figure 1.3: “IEEE 802.11 and the ISO Model”

Source: http://www.tutorial-reports.com/wireless/wlanwifi/introduction_wifi.php
The major motivation and benefit from Wireless LANs is increased mobility. Untethered from
conventional network connections, network users can move about almost without restriction and
access LANs from nearly anywhere.
The other advantages for WLAN include cost-effective network setup for hard-to-wire locations
such as older buildings and solid-wall structures and reduced cost of ownership-particularly
in dynamic environments requiring frequent modifications, thanks to minimal wiring and
installation costs per device and user. WLANs liberate users from dependence on hard-wired
access to the network backbone, giving them anytime, anywhere network access. This freedom
to roam offers numerous user benefits for a variety of work environments, such as:
z z Immediate bedside access to patient information for doctors and hospital staff
z z Easy, real-time network access for on-site consultants or auditors

z z Improved database access for roving supervisors such as production line managers,
warehouse auditors, or construction engineers
z z Simplified network configuration with minimal MIS involvement for temporary setups
such as trade shows or conference rooms

z z Faster access to customer information for service vendors and retailers, resulting in better
service and improved customer satisfaction

z z Location-independent access for network administrators, for easier on-site troubleshooting
and support
z z Real-time access to study group meetings and research links for students

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