Contents
1 Introduction to WLAN
Introduction to WLAN
Wired transmission media are usually used on a local area network (LAN), but these wired media bring some problems in specific scenarios. For example, dial-up lines have low transmission rates, and leased lines are expensive. Twisted pairs and coaxial cables also have problems of high installation fees, long construction periods and inconvenient deployment.
As wireless network technologies develop fast, wireless media can transmit text, voice, images, and even voice and images at the same time. The transmission distance of a wireless network can reach tens of kilometers. Wireless networks are more widely used currently, and the cost of wireless network construction is acceptable to most enterprises. Therefore, wireless networks can compete with wired networks in performance, transmission distance, and cost, even better than wired networks in some aspects.
WLAN Deployment
- The 2.4 GHz and 5 GHz frequency bands are allowed by local laws.
- The property management policy permits WLAN deployment.
WLAN Infrastructure
- AP: WLAN access device. Huawei provides a series of fit APs to meet indoor and outdoor networking requirements.
- PoE switch: upstream devices for APs. It provides data switching and power for APs. If only one AC is required and the AC has PoE ports, the PoE switch is not required.
- AC: manages APs and controls the rights of WLAN users.
- RADIUS server: authenticates WLAN users and assigns rights to them. The RADIUS server is installed on the SPES server.
- NMS: manages APs and ACs. It monitors status of ACs and APs in real time, processes alarms, and analyzes data.
