Answer: 
The two problems which might technician suspect is: 
- The wireless signal is too weak. 
 
- There is interference from outside sources. 
 
Explanation: 
Several issues occur during the wireless networks: 
- The internet connection is slow or no access to the internet in certain rooms. 
 
- The internet connections drops at the random times. 
 
- Sometimes Wi-Fi(Wireless Fidelity) network will disappear completely. 
 
- Sometimes the networks connect, but there’s no access to internet connection. 
 
- Always the router crashes and it works only restarting the router.