Wi-Fi Weaknesses

 -> The use of Wi-Fi band that is 2.4 GHz does not require a license in most countries provided that is stays below       
     limit of 100mW and one accepts interference from other sources; including interference which causes the users      
     devices to no longer function.

 -> The spectrum assignments and operational limitations are not consistent worldwide.

 -> Power consumption is fairly high compared to some other standards, making the battery life and heat a concern      
     to some users.

 -> Wi-Fi uses the unlicensed 2.4GHz spectrum, which often crowded with other devices such as Bluetooth,      
     microwave ovens, cordless phones, or video sender devices, and among many others. This may cause      
     degradation in performance.

 -> Wi-Fi networks have limited range. A typical Wi-Fi home router might have a range of 45m (150ft) indoors and      
     90m (300ft) outdoors. Ranges may also vary as Wi-Fi is no exception to the physics of radio wave propagation      
     with frequency band.

 -> The most common wireless encryption standard, wired equivalent privacy or WEP has been shown to be      
     breakable even when it has been correctly configured.

 -> Access points could be used to steal personal and confidential information transmitted from Wi-Fi consumers.

 -> Intervention of a closed or encrypted access point with other open access points on the same or a nearby      
     channel can prevent access to the open access points by others in the area. It poses a high problem in high-     
     density areas such as large apartment blocks where many residents are operating Wi-Fi access points.

 -> Inter-operability issues between brands or deviations can cause limited connection or lower output speeds.

 -> Free access points can be used by the malicious to anonymous to initiate an attack that would be extremely      
     difficult to track beyond the owner of the access point.


WiMAX Weaknesses


 -> Very long range connectivity (greater than 5 miles) – this is realistically achievable only with a high-quality 
     external antenna and line-of-site service to the base station

 -> Lack of available high-quality spectrum

 -> Bad weather conditions such as rain could interrupt the signal

 -> Other wireless equipment could cause interference

 -> Multiplied frequencies are used

 -> WiMAx is a very power-consuming technology and requires significant electrical support

 -> High installation and operational cost