Fault Analysis of wireless network

The gradual entry of the IEEE 802.11-based WLAN into the mainstream network makes fault diagnosis and security for wireless networks as important as wired networks.

An analyzer that supports multiple modes can scan all 802.11 bands, including all channels in the 2.4GHz and 5GHz bands, and graphically display them to see if the configuration is reasonable, what the SNR is, how much bandwidth is available, and other related issues. If an AP has a prominent flow, it may be because a lot of clients are surfing through the AP, on the other hand, it may be that some particular application or protocol is taking up a lot of bandwidth. Technical personnel carry Wireless Analyzer can search "send traffic most", quickly determine whether there are MP3 download, bt download applications, these in the wireless network is a need to prohibit the application.

RF signal Failure

Unlike wired networks, the performance of wireless networks is affected by changes in location and environment for AP and client locations. When a client roaming to the RF signal is very weak place, may cause the blind area of the wireless network. These blind spots can have an impact on some applications, such as VoIP applications based on wireless networks.

Troubleshooting steps

When a user encounters a wireless connection failure, it usually seeks the help of an internal IT support person. A technician using a tester can successfully log on to a wireless network from a client location, the problem may be in the configuration or permissions of the client device. If the tester cannot connect to the server, the problem may be in the physical layer of the wireless or wired network. In addition, not enough bandwidth, request queuing timeout, conflict interference, etc. may also be the root cause of the failure. (Computer science)

The network administrator uses the wireless tester to scan the wireless network environment from the fault location to measure signal strength and AP performance. In passive mode, the tester's wireless network card receives only the signal and does not send data. If the RF quality can meet the requirements, then the administrator can use client mode to log on to the wireless network for testing, such as login test, ping and throughput test.

Support for security testing

As mentioned earlier, wireless networks are dynamic, and when deployed, they are sometimes brought in by unauthorized devices due to human error and sometimes increased coverage of wireless network access. Most of the time, because wireless networks provide access in three-dimensional space, unauthorized APS may be connected. In addition, it is possible that the design error caused this result.

Network review

From a security standpoint, it is predicted that in 2006, 70% of malicious attacks could be caused by a security vulnerability caused by an AP or client-side error configuration. The Wireless Test tool helps organizations periodically review the configuration of AP and clients to see if these configurations conform to corporate security policies.

Research institutes recommend that enterprises regularly check device configurations, and if the enterprise chooses a WPA network, PEAP is an effective way of authorizing the administrator to ensure that all AP is configured as PEAP.

It is necessary to carry out periodic on-site survey of wireless networks, and network administrators can use hand-held tools to analyze the quality of RF signals to see if performance has fallen.