A statistical hypothesis is an assumption about a population parameter. This assumption may or may not be true. Hypothesis testing refers to the formal procedures used by statisticians to accept or reject statistical hypotheses. The best way to determine whether a statistical hypothesis is true would be to examine the entire population.
Dynamic Frequency Selection. DFS is a spectrum-sharing mechanism that allows wireless LANs (WLANs) to coexist with radar systems. It automatically selects a frequency that does not interfere with certain radar systems while operating in the 5 GHz band.DFS is a feature of ETSI BRAN HIPERLAN/2 and IEEE Standard 802.11h.FS detects radar interference and moves the wireless network to another frequency with no interference. It maintains a list of channels where radar has been detected in the NOL (non-occupancy list). The AP avoids using these channels for at least 30 minutes after detecting radar on them.
A DFS link can also point to another DFS Root. This configuration allows you to create large DFS trees that combine other DFS tree. To add a DFS link: 1  In the Distributed File system, click the DFS Root to which you will add a DFS link.2  On the Action menu, click New DFS Link. 3  Configure the Add to DFS dialog box options like link name, comment; send the user to this folder and client cache this referral for x seconds. DFS link can also point to another DFS Root. This configuration allows you to create large DFS trees that combine other DFS tree. To add a DFS link: 1  In the Distributed File system, click the DFS Root to which you will add a DFS link.