You are a security analyst and have networking monitoring solutions in place to detect strange or potentially malicious traffic. One of these solutions has sent an alert saying it detected outgoing network traffic from the company's network that was routing to a well-known malicious endpoint. Of the following options which is the **most** likely to be the cause of this traffic? | CompTIA practice tests, questions, flash cards and simulations

You are a security analyst and have networking monitoring solutions in place to detect strange or potentially malicious traffic. One of these solutions has sent an alert saying it detected outgoing network traffic from the company's network that was routing to a well-known malicious endpoint. Of the following options which is the most likely to be the cause of this traffic?

A hacker is probing the company network from the outside
A colleague on your team is conducting a pentest
An infected server or user machine is attempting to contact a command-and-control server
A user has attached confidential materials to an outgoing email