Precautions for using enterprise wireless access points (1)

I. speed matching

As we all know, wireless devices have evolved from early 802.11b (11 Mbps) specifications to mainstream 802.11a/g (54 Mbps) and 802.11n (270/300 Mbps) and MIMO (108/240 Mbps ), the following products are forward compatible. For example, when an 802.11g device detects a 11b device, the 11g device performs a request-to-send/clear-to-send (request-to-send) handshake on each packet before sending the data packet ), 802.11g wireless devices can work in the 802.11b network environment, but the speed is only 11 Mbps, not up to 54Mbps.

When using high-speed wireless devices, pay special attention to speed matching, so as to avoid pulling the horse

In addition, 802.11g products are not compatible with 802.11a. Although they all reach a rate of 54Mbps, they work in different frequencies. This is also true for several 802.11g + (802.11g enhanced version) Products (the Super G Technology launched by Atheros has elevated the nominal WLAN transmission rate to 108 Mbps; Conexant has released the M Nitro XM technology; broadcom also launched 125 M AfterBurner technology products), and they can only be compatible with each other's product standards.

However, 802.11n (270/300 Mbps) and MIMO (108/240 Mbps) products also have such problems in combination. As long as there is a different high-speed device in the network, they can only work in up to 802.11g (54 Mbps) mode, because wireless devices of different technologies are not compatible with each other, but they are compatible with the most popular 802.11 GB.

Therefore, enterprise users must pay attention to standard items when selecting wireless products, that is, to achieve the best wireless speed, the selected Wireless AP, wireless router, and wireless network card must be the same as the standard product. For low-speed wireless network devices in enterprise wireless networks, if you do not want to reduce network performance, the best solution is to reduce the number of customers for low-speed wireless devices or upgrade them to mainstream high-speed wireless devices of the same standard.

Of course, due to the special nature of wireless transmission, not all mainstream 802.11g + (Mbps and above) and 802.11n (270/300 Mbps) and MIMO (108/240 Mbps) devices are used in the network, the entire wireless network must be in full speed. The connection distance of wireless devices and various signal interference will reduce the performance of the wireless network, even if there are only two such devices in the entire Wireless Network (to keep the signal connection automatically slow down ), the speed of the entire wireless network will also be reduced to the lowest speed.