... being in direct line of sight with each other. Although you can purchase and install an IrDA-based network capable of transmitting data at speeds up to 4 megabits per second (Mbps), the requirement for line of sight means that you would need an access point in each room, limiting the usefulness of an IrDA network in a typical home layout. SWAP and Wi-Fi are based on specifications for the wireless-Ethernet specification, known as IEEE 802.11, designated two ways of communicating between devices and allowed for speeds up to 2 Mbps. Both communication methods, direct-sequence spread spectrum (DSSS) and frequency-hopping spread spectrum (FHSS), use the frequency-shift keying (FSK) technology we discussed in power-line networking. The HomeRF Working Group (RF stands for radio frequency) was an alliance of businesses that developed a standard called Shared Wireless Access Protocol (SWAP). * A sort of hybrid standard, SWAP includes six voice channels based on the Digital ...

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