Hello everyone welcome to the show "Ethical Hacking" episode 85 today we are going to discuss about Wireless access points.In addition to selecting the right encryption,it's also important to select the right placement and configuration of your wireless access points,in order for you to achieve a good security posture.Most small office, home office wireless system rely on a single point to multi-point setup.This relies on having a single access point that services all of the wireless clients.For example, on this floor plan,you can see the strongest signal is the red spot,that's centered around a single wireless access point,and all of the other office cubicles are connecting back into it.In this next example,you can see a multi-point to multi-point system.This has multiple access points that are going to be used to provide the wireless network services in an ESS,or extended service set configuration.They're all going to work together to provide one common network that's supported by these multiple access points.Now, in both of the previous examples,the wireless access points are using an omnidirectional antenna.This means that the access point is going to radiate out its signal equally in every single direction.Now, this can be good from a coverage perspective,but it also is dangerous.You may want to control which direction the signal is actually radiated, and if you do,you can do that using a bidirectional or a unidirectional antenna.For example, in a unidirectional antenna,all of the transmission power is going to be focused at a single direction.This allows you to choose which areas receive the signals,and which ones don't.So in this example,we're using a left-side focused antenna and it only transmits out to computers on that side of the building,while the computers on the right are going to remain in an uncovered area and not get any signal.Now, we've talked about this back in our network plus curriculum as well,but from an operational standpoint,we're trying to increase the coverage to all areas,when we're talking network plus.Now, from a security perspective, though,we may actually want to limit the area of coverage.Let's look at our heat map once more.Here you can see an extended service set configuration with two access points.Each of those access points has omnidirectional antennas.This is giving us good,adequate coverage around the office base,as you can see inside the floor plan.So our network technician for network plus did a good job here.Now, for this office,each cubicle also has a wired physical connection,but the access point there is just to provide the employees access while they're sitting at those conference tables in the middle,or if they're walking around using their cellphones.Now, all of this is great,and there's good coverage,meaning that it's meeting our operational needs.But, you'll also notice that orange and yellow area,which represents the medium and lower signal areas that are radiating outside the walls of the building.