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สวิตช์
โซลูชันไร้สาย
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Standard protocol for wireless 4g router with external antenna
A wireless 4g router with external antenna is like an extended product that combines a simple wireless AP and a broadband router into one. It not only has all the functions of a simple wireless AP, such as support for DHCP clients, support for VPN, firewall, support for WEP encryption, etc., It also includes a network address translation (NAT) function to support network connection sharing for LAN users. It can realize the Internet connection sharing in the home wireless network, and realize the wireless shared access of ADSL, Cable modem and residential broadband.
By 2013, the mainstream protocol standard supported by wireless router products is IEEE 802.11n, and it is backward compatible with 802.11g and 802.11b. Here we must first understand the meaning contained in this standard. The "IEEE" at the beginning of the agreement is an international wireless standards organization that is responsible for the formulation of standards for electrical and electronic equipment, test methods, original devices, symbols, definitions, and test methods.
In the field of wireless routers, in addition to the above two protocols, there is actually an IEEE802.11a standard, but it has not been popularized because of its poor compatibility. The IEEE802.11b and 802.11g standards are compatible. The biggest difference between them is that they support different transmission rates. The former can only support 11M, while the latter can support 54M. The 802.11g+ standard can support a wireless transmission rate of 108M, while the newly launched 802.11n can reach a wireless transmission rate of 150M, and the transmission speed can be basically the same as that of a wired network.
