< > [Networks](../index.html) > Networks
##Networked Embedded Systems
Embedded systems can be distributed and networked using an I/O Bus or via a Networking Protocol. A Bus is a transmission path on which signals are dropped off or picked up at every device attached to the line. Only devices addressed by the signals pay attention to them; the others discard the signals. A Bus Network is an arrangement in a local network in which each node is connected to a main cable or link called the bus. A bus network is simple and reliable. If one node fails to operate, all the rest can still communicate with each other.
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Global implementation of networked embedded system
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####Types of embedded system networks
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<li>Bus Communication for Networking: each specific I/O device may be connected to other using specific interfaces, for example LCD controller, keyboard controller etc. Bus communication simplifies the number of connections and provides a common protocol of connecting devices</li>
<li>I/O Bus: any device that is compatible with a system's I/O bus can be added using a driver. I/O devices communicate with the processor through an I/O bus, which is separate from the memory bus that the processor uses to communicate with the memory system.</li>
<li>Serial Bus: can connect (~25cm long) a wide range of I/O devices without having to implement a specific interface for each device.</li>
<li>Parallel I/O Bus: allows a computer or controller or embedded system to interface with internal systems at very short distances without having to implement a specific interface for each I/O device.</li>
<li>IP (Internet Protocols): using Internet or intranet, a computer or controller or embedded system IO device interface can globally network with computers and a wide range of devices.</li>
<li>Wireless: a Short Distances Wireless Bus Protocol allows up to 100m using a wireless personal area network (WPAN)without having to implement a specific wireless interface for each I/O device.</li>
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IO BUS
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