Page 134 - DCAP104_EXPOSURE_TO_COMPUTER_DISCPLINES

Unit 6: Data Communication

 Wi-Fi: “Wi-Fi” is a term used to describe 802.11 WLANs, although it is technically a declared Notes
standard of interoperability between 802.11 devices.
 Fixed Wireless Data: This implements point to point links between computers or networks
at two distant locations, often using dedicated microwave or modulated laser light beams
over line of sight paths. It is often used in cities to connect networks in two or more buildings
without installing a wired link.

Figure 6.15

WN-4054P
Wireless PC Card
WN-4001B2
WA-4054EX WDS w/RADIUS mode
Wireless AP Router
WN-4054U
Wireless USB Stick
WP-4001B2 JAT-24006FB
WDS mode

WN-4054P WP-4001B WN-4054PCI
Wireless PC Card Repeater mode Wireless LAN PCI Adapter
6.5.1.3 Wireless MAN
Wireless Metropolitan Area Networks are a type of wireless network that connects several
Wireless LANs.
 WiMAX is a type of Wireless MAN and is described by the IEEE 802.16 standard.

Figure 6.16

SOHO
customer
Residential
customer

Multi-tenant Basestation
customers
Core
network
repeater
Basestation SME
customer

6.5.1.4 Wireless WAN
Wireless wide area networks are wireless networks that typically cover large outdoor areas. These
networks can be used to connect branch offices of business or as a public internet access system.
They are usually deployed on the 2.4 GHz band. A typical system contains base station gateways,
access points and wireless bridging relays. Other configurations are mesh systems where each
access point acts as a relay also. When combined with renewable energy systems such as photo-
voltaic solar panels or wind systems they can be stand alone systems.

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