ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 276)

cal network outlets. This central location can be in the technical room as close to the

LAN Ethernet network devices as possible.

In the case of a centralized mode architecture (HomePlug AV), the architecture

devices are the CCo (central coordinator) and the STA (stations). There is only one

CCo per AVLN (AV logical network) to manage the PLC links between the network

PLC devices. HomePlug AV specifies that the device best “placed” in the electrical

network, i.e., the device that can view the other devices, is automatically configured

as CCo because of its functionalities. Therefore, it is judicious to place this device at

the most central point of the electrical network (circuit breaker panel) from which it

can view all the STA devices of the HomePlug AV PLC network.

These various network architecture options are illustrated in the implementa-

tion example presented at the end of the chapter.

Security Parameters

As we have seen in the previous chapter dedicated to home networks, it is important

to correctly configure the keys of the PLC networks so that no malevolent person

can get into it and recover the frames circulating over the electrical network.

Let’s specify that, unlike Wi-Fi technologies, which use the air and can therefore

be potentially listened to, as the physical medium, the PLC technologies make it

extremely difficult to connect to the electrical medium to try to recover these

frames.

Security Parameters 257

Figure 11.6 PLC signal injection at the circuit breaker panel of a building

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 276