Question

You have been using your phone and your school's Wi-Fi network to access hosts on the Internet. Suddenly, you cannot reach Internet hosts. Create a two-column table. a) In the first column, create a list of possible causes. b) In the second column, describe how you would test each one. (You may not be able to test them all.) Create a table list.

Answer 1

Here is the possible causes to not get access to internet hosts even though we are connected to the wireless access point.

Causes	Possible Tests/Solutions
Main Router cable broke or removed	This may be one of the main cause of not getting internet access. We can solve this by checking the internet i.e mostly DSL cable coming from ISP. If you failed to check that we can contact the Internet Service Provider(ISP)
Out of Range	Every Wi-Fi whether its in school or college or even at public there is a wifi range where any network device can connect with credentials. Make sure that you are in wi-fi range but not out of it. Also check the strength of your Wi-Fi. if its low try to move closer to Wi-Fi Access point.
Malware infected in Mobile	Sometimes any malware in mobile consume whole internet or even block the internet traffic. Make sure you installed with Antivirus to remove that malware.
Blocked by the firewall	Make sure that the firewall installed at edge router didn't blocked your IP address. If blocked try to contact admin to change configurations and make your IP unblocked.
Proxy Server	Most of the schools use proxy servers to monitor and provide internet access. Make sure you connected to right proxy and also with right credentials.
Not having DHCP	Most of the Wi-Fi will work with DHCP. But it also better to check the Dynamic Host COnfiguration Protocol is working well.
Change of settings in Wi-Fi	Try to connect your Access point or tell the admin to connect and tell them to check if any changes happen that stop you to not get internet access

***Still if you have any doubt please feel free to comment...Thank you...Please UPVOTE***