US Robotics USR2410 Manual de usuario descargar pdf (Pagina 17)

Figure 2-3: Example of NAT

To access resources outside its network a system sends data to the router, which passes the packet

along to the outside network. Packets that arrive at the router from a system have their source

address changed to be that of the router, and are sent out to another network. When the replies

arrive back at the router, the destination addresses are translated back to match that of the original

sender. This process of packet flow management is known as routing. As can be seen in the

figure below, a computer on network A sends data through the router to a computer on network

B. The source and destination address of the data packet changes as the router performs NAT.

2.3

Mesh Ne tworking Overview

Figure 2-4 shows the overall topology of a wireless mesh network. Wireless mesh networks are

networks where connections are formed between each router rather than connecting through a

central gateway. These networks are commonly known as multi-hop networks, as a packet must

hop wirelessly a number of times from one router to the next before they reaching the gateway.

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US Robotics USR2410 Manual de usuario Pagina 17