Cổng Internet và các thiết bị định tuyến cáp / DSL chắc chắn là cách dễ nhất để thực hiện việc chia sẻ kết nối Internet, nhưng chúng ta biết của một phương pháp kinh tế hơn - dựa trên phần mềm chia sẻ bằng cách sử dụng một máy tính kèm theo. | Chapter 9 Setting Up Internet Sharing 175 Setting Up Internet Connection Sharing Internet gateways and cable DSL routers are certainly the easiest way to accomplish Internet connection sharing but we know of a more economical method software-based sharing using an attached PC. We should say right up front that we think that the hardware approach that is using a wireless Internet gateway or a cable DSL router is the best way to go. But if you really need to save a few bucks and we mean only a few because you can get a router for 50 these days try this approach. It works but it s not as good as the hardware approach because it can affect the performance of both your network overall as well as the particular computer that you use for Internet connection sharing. Windows 98 Second Edition SE and later versions of Windows provide a software-based solution for sharing an Internet connection over a local area network LAN . This option is available whether you re using a wired network a wireless network or a combination of the two. Software-based Internet connection sharing is not efficient if you have more than four computers trying to share an Internet connection simultaneously. The cost of a broadband router is far less than the cost of a dedicated computer in most cases. And broadband routers usually contain other features that this software connection sharing doesn t offer such as port forwarding Port Address Translation PAT to forward incoming requests to specific machines based on port as well as offering a demilitarized zone DMZ . A DMZ in the network world is a network zone that has no firewall protection we discuss this more in Chapter 10. On the other hand if you have an extra computer lying around and have time on your hands to maintain it software-based Internet connection sharing could be your best option. We re still not convinced. When you set up a Windows software-based shared Internet connection you select one computer to be the Internet connection host .