【2019-03-17】off-channel scanning 简单笔记

[历史归档]本文原发布于 cstriker1407.info 个人博客内容为历史存档仅供参考。发布时间2019-03-17 标题off-channel scanning 简单笔记分类网络通讯 / WIFI 标签802.11·off-channeloff-channel scanning 简单笔记参考【 https://www.wi-fi.org/knowledge-center/faq/what-is-off-channel-scanning-for-wi-fi-access-points-aps 】【 https://www.wi-fi.org/knowledge-center/faq/what-is-off-channel-scanning-for-wi-fi-client-devices 】What is off-channel scanning for Wi-Fi client devices?Off-channel scanning is when a Wi-Fi client device tunes its radio to another channel to look for available APs or scans for APs on a channel to which it is not connected (hence “off-channel”). The client scans the off-channel APs looking for a suitable AP to connect to in case it needs to roam from its current ‘on-channel’ AP.What is off-channel scanning for Wi-Fi access points (APs)?An access point (AP) can also perform off-channel scanning. This process is the same as off-channel scanning for Wi-Fi client devices and essentially allows the AP to tune its radio to a different channel for a finite amount of time. Off-channel scanning is typically used as a method to detect sources of interference, rogue or unauthorized ad-hoc Wi-Fi networks. The operation of performing off-channel scanning is highly dependent in terms of manufacturer implementation and configuration of the WLAN.