nications interfaces, network interface cards for the various devices participating on the network, gateways, servers, sensors, controllers, and some form of operating system. A variety of broadband services-including DSL, coax cable, fiber, wireless, and hybrid arrangements-are all possible. Those ser- vices will terminate on the home network gateway, which will connect to some form of a communications hub, a residential gateway device that can then split the signals and deliver them to the proper receivers. From the residential gateway there will then be several different networks. The automation and control network may Chapter 12 Broadband Access Alternatives Powerline Broadband Network Wireless Lighting Gateway Phone Lines Control Services Cat 5 Home Management Security Connection Center System (control) System PC & Data (includes residential Surveillance Laptop Network gateway) Camera Thermostats Wireless Data Network Furnace Room Entertainment Heating Distribution Appliances and Devices Desktop Telephones Microwave Stereo System Figure 12.10 Home networking elements include the various sensors that help automate the home to make life easier and happier. Mobility networks will be wireless networks that allow a user to roam within the range of a home and the outdoor area surrounding it. Computer interconnection is one of the major applications of HANs. It allows access to the Internet and the connection and communication of multiple PCs with various peripherals and communications and entertainment devices. This com- puter connection requires very high-speed networks. Generally, homes with two or more computers are considered to be prime candidates for this type of HAN. In addition, controlling the home-including managing lights, appliances, climate control systems, and surveillance cameras-will be a huge market for HANs. Types of HANs Several different technologies can be applied in HANs. The home network is likely to become a layered network, just like the enterprise network, where there's a need for backbon