Two people arrive at a building dressed as repair workers. An employee arriving at work opens the door with their key card, and the two people follow them in$.$ As soon as they have access to the building, they hack into a computer and steal confidential information. What kind of attack is this?

A zero day vulnerability attack

A phishing attack

A spoofing attack

A tailgating attack

Which of these is an XSS $($Cross$-$site scripting$)$ injection attack?

An attack that overloads a system with ICMP echo requests to overwhelm it$,$ and to prevent legitimate users from accessing it$.$

An attack that inserts malicious code into a website and targets the users of a service

An attack that targets a whole website and uses database commands to delete or steal data and run other malicious commands

An attack where attackers fool an employee into letting them into a restricted area or building