The so-called one-port shared Internet access, here refers to the same LAN, the two machines share a Hub or switch port to share Internet access. Before Windows XP, this idea may be difficult to implement in Microsoft's operating system. However, since the release of Windows XP, it is not difficult to realize this concept by using the new "bridge" function. A LAN has added a client, but the hub port is full, which means that the newly added client can't access the LAN, and even the shared resources can't be accessed, let alone share the Internet. The network management does not intend to add a hub. At this time, the "bridge" function of Windows XP comes in handy, but a prerequisite is required, that is, the LAN must have a Windows XP system client with a dual network card installed. Prerequisites are available, and the idea will be realized soon. In order to easily distinguish the description objects, the following client with dual network card is called "Customer A", and the new client is called "Customer B". The method is as follows: : First make sure that "Customer A" can access resources on the LAN and share Internet access, open "Network and Dial-up Connection", rename the "local connection" that was originally connected to the local area network to "local connection-host", and another "local connection" Rename it to "Local Area Connection - Customer", and then use the twisted pair (two-machine direct connection) to directly connect the NIC corresponding to "Local Area Connection - Customer" and the NIC on the "Customer B" machine. Next, set the network properties on the "Customer B" machine, specify an empty IP address and "computer name", other settings such as "subnet mask", "default gateway", "DNS server", "workgroup" and "customer A" "The settings of the machine are the same. Now if "Customer A" and "Customer B" can access shared resources with each other, then it means that they have already succeeded in half. The next thing to do is to use Windows XP "bridge" to connect "local connection-host" and "local connection". - Customers are connected. On the "Client A" machine, enter the "Network and Dial-up Connection" window, right click on "Local Area Connection - Host", click the "Bridge" command in the menu, the system starts to bridge the two connections, when the bridge is successful After opening the "Bridge" property page, all the adapters are set to connect to the local network, now open IE browser, "Customer B" machine can also access the Internet, thus achieving the sharing of a Hub port shared Internet access in the LAN . According to this method, if a new client is added to the LAN, the new client can be bridged by another client in the LAN, and so on, if the "Customer B" machine in the above method can also be bridged. Clients, then you can say that LAN only needs a Hub is enough, but if there are more new clients, it is recommended to buy a Hub as well, not only "bridge" is the need to add a network card. If there is a better way to achieve this theme, I hope everyone will add.