A close friend of yours watched a few episodes of a cybersecurity TV show and has become the resident expert on all things cybersecurity-related. They point out that you should never use public Wi-Fi as all traffic sent over the Wi-Fi network can be viewed by an attacker. 

 

1) Do you agree with their assessment? 

2) Which protocol sends data in cleartext? Which sends it encrypted? 

3) What would happen if an attacker tries to view TLS-encrypted traffic passively? 

4) What would happen if an attacker actively tried to intercept TLS-encrypted traffic? What is this attack called?