A company has hired a security administrator to maintain and administer Linux and Windows-based systems.
Written in the nightly report file is the following:
Firewall log files are at the expected value of 4 MB. The current time is 12am. Exactly two hours later the size has decreased considerably. Another hour goes by and the log files have shrunk in size again.
Which of the following actions should the security administrator take?

What type of analysis is performed when an attacker has partial knowledge of inner-workings of the application?

As an Ethical Hacker you are capturing traffic from your customer network with Wireshark and you need to
find and verify just SMTP traffic. What command in Wireshark will help you to find this kind of traffic?

What does a firewall check to prevent particular ports and applications from getting packets into an organization?

Which type of antenna is used in wireless communication?