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What is the difference between wireless network extender and bridge?



What is the difference between wireless network extender and bridge?


In order to set the relay function of the wireless router, we carefully studied dd-wrt six wireless modes, no longer confused. 

1. Access Point (AP) In this mode, the router's wireless network card is like a "wireless hub" that is responsible for establishing a data link (equivalent to an invisible network cable) between a wireless router and a computer. Under normal circumstances, the wireless connection of the home wireless router works in this mode by default. 


2. The client works like a wireless network card on a laptop, connecting only to other wireless networks without transmitting its own wireless network signals. For wireless routers, this mode is equivalent to enabling a wireless WAN port, and the following computers can only be wired to this device. In this mode, the wireless router still provides DHCP and NAT functions, and the internal IP address segment LAN composed of four internal LAN ports connects to the external main network through its own gateway on the wireless router. 


3. Client Bridge Similar to Client mode, it is equivalent to enabling a wireless WAN port, and the following computers can only be connected to this device by wire. However, the internal LAN port and the connected LAN are in the same IP address segment. Internal DHCP requests are also forwarded to the primary wireless network. 


4. AdhocAdhoc has a figurative metaphor that looks like it connects the two computers directly to the root network cable, except that it is wireless here. The most common devices that use adhoc to connect are mostly handheld game consoles. This mode is rarely used on wireless routers. 


5. Repeater (Repeater) As the name implies, the relay is one side is to accept the signal, while transmitting their own wireless signal. In this mode, the wireless router accesses the master AP as a wireless network card client, and then adds wireless interfaces to the clients with new virtual interfaces. The greatest significance of this model is to solve the wireless signal by the distance or obstacles can not be transmitted further away. In this mode, the wireless router still provides DHCP and NAT functions, that is, all the internal LAN ports and wireless client access constitute a separate LAN segment. 


6. Repeater Bridge Like repeater mode, it can solve the problem that the wireless signal can not be transmitted further due to distance or obstacle. However, the computer terminal accessing the wireless router is in the same IP address segment as the main wireless network. Internal DHCP requests are also forwarded to the primary wireless network. 


Summary: Under normal circumstances, the wireless router to work in "AP" mode. No special needs of people do not toss it. If you have an existing wireless router that has too many walls between it and your laptop (for example, if you want to share the internet with your neighbors), you may encounter signals near the window and the signal near the computer is too weak. At this time, then buy a dd-wrt router, set to "relay" way you can solve the problem of insufficient signal transmission distance. As for the choice of "relay" or "relay bridge", we must look at their needs. For example, the relayed network is also its own home, then the proposed use of "relay bridge." This can make all the computers in the same segment, more convenient to visit each other. If you want to build another independent network segment to improve security, then choose "relay" mode. The use of "client" occasions less, there is a possibility that the computer at home are using the Internet cable, but need to share someone else's home wireless connection. This time can choose this mode. In general, if there are "bridge" words in the network terminology, the majority means that both networks are in the same IP LAN when they are connected at the data link level. Use "Adhoc" mode too little, rabbit brother did not figure out when this mode should be used. If anyone knows, please let me know.