Which of the following files contains the shadowed password entries in Linux?

While using Wire shark to investigate complaints of users being unable to login to a web application, you come across an HTTP POST submitted through your web application. The contents of the POST are listed below.
Based on what you see below, which of the following would you recommend to prevent future damage to your database?

You work as a Network Administrator for NetTech Inc. The company wants to encrypt its e-mails. Which of the following will you use to accomplish this?

What does it mean if a protocol such as HTTP is stateless?

Which of the following is a process of monitoring data packets that travel across a network?