4 CHAPTER 1 Introduction
The higher spectrum provides about 50m (164ft) of coverage.
Consider 802.11a when you need high throughput in a confined
space and you are:
Running high-bandwidth applications like voice, video, or
multimedia over a wireless network that can benefit from a
five-fold increase in data throughput.
Transferring large files like computer-aided design files,
preprint publishing documents or graphics files, such as MRI
scans for medical applications that demand additional
bandwidth.
Supporting a dense user base confined to a small coverage area.
Because 802.11a has a greater number of non-overlapping
channels, you can pack more wireless devices in a tighter space.
802.11b/g
802.11b and 802.11g both operate in the 2.4GHz band. 802.11b
can support data rate up to 11Mbps. 802.11g can support data rate
up to 54Mbps. They both support the widest coverage – up to
100m (328ft). It is however, subject to a greater risk of radio
interference because it operates in the more popular 2.4GHz band.
Consider 802.11g when you need wider coverage and vendor
compatibility and you are:
Maintaining support for existing 802.11b users and the existing
wireless investment while providing for expansion into 802.11g.
Implementing a complete wireless LAN solution, including
Ethernet Adapters, gateways, access points and clients; Wi-Fi
certification guarantees compatibility among vendors.
Providing access to hot spots in public spaces such as coffee
shops or university cafeterias.
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