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		Aside: Bluetooth vs. IrDA
		ü IrDA:  Line of sight vs. omnidirectional BT – IrDA has advantages and disadvantages – Low-tech security for data transfer… • E.g., business cards – Inconvenient for Internet bridge solutions – Connected IrDA devices must remain relatively stationary – Higher bandwidth than Bluetooth (4-16Mb/sec) – Similar high-level standards (e.g., OBEX) – But Bluetooth supports multipoint communication – Current costs for deployment of IrDA are much cheaper (< $2/unit)