Introduction to Wireless Broadband router

Popular wireless routers in the market generally support dedicated line xDSL, cable, dynamic xDSL, PPTP four kinds of access mode, but also some other functions of network management, such as NAT firewall, DHCP service, MAC address filtering and so on. Wireless router is a router with wireless coverage, which is mainly applied to users ' internet and wireless coverage.

I. Data transmission rate of wireless routers

The transmission rate of a wireless network refers to its ability to receive and send data under certain network standards. In wireless networks, the transmission of data through the signal, and the actual use of the environment will be more or less the transmission of the signal caused a certain degree of interference, so the performance and environment have a great relationship.

The actual transmission speed of WLAN can only reach half of the nominal maximum transmission speed of the product. For example, 802.11b theory maximum speed of 11M, in a better wireless network environment, the transmission of 100MB files need about 3 minutes, and the same environment, for the support of 802.11g products, the transmission of 100MB files only need 30 seconds or so.

Second, the principle of wireless router

The wireless router (Wireless Router) is like an extended product that combines a simple wireless AP with a broadband router, not only with all the features of a simple wireless AP, such as supporting VPNs, supporting WEP encryption, supporting DHCP clients, firewalls, and so on, but also including network address translation ( NAT) feature to support network Connection Sharing for LAN users. Can realize the Internet Connection Sharing in the home wireless network, realizes the ADSL and the community broadband wireless sharing access.

Wireless routers can be connected to all Ethernet connected ADSL modem or cable modem, can also be used in the switch/hub, broadband router and other LAN mode, and its built-in simple virtual dial-up software, can store username and password dial-up Internet, Can be implemented for dial-up access to the Internet ADSL, CM, etc. to provide automatic dialing features, without the need to manually dial or occupy a computer for server use.

Wireless routers generally also have a relatively more complete security protection function.

Protocol standard of wireless router

Wireless router current wireless router product support of the mainstream Protocol standard for IEEE 802.11g, and backward-compatible 802.11b.

In the wireless router domain, in addition to the above two kinds of protocols, there is actually an IEEE 802.11a standard, but because of its not very good compatibility and not popular, And the ieee802.11b and 802.11g standards are compatible, the biggest difference is that the support of the transmission rate is different, the former can only support 11M, and the latter can support 54M. The new 802.11g+ standard can support the 108M wireless transmission rate, transmission speed can be basically flat with the cable network.

To sum up, if you build a wireless network with frequent data transmission and a certain rate of transmission, it is preferred to support the IEEE802.11G standard wireless router, and if it is the first wireless network, you can choose to support ieee802.11b products with relatively low price.