Which software or system tool prevents unauthorized external access to a network or private system?

Which of the following statements is/are true? [1] SMTP is used to receive emails from a server, while IMAP is used to send emails. [2] HTTP and HTTPS are protocols used for accessing websites, but HTTPS provides a secure, encrypted connection.

Match the type of hacker in Column A with their correct description in Column B: Column A (Type of Hacker): A) Black Hat Hacker B) Gray Hat Hacker C) Green Hat Hacker D) Blue Hat Hacker Column B (Description): 1) Eager to learn hacking, typically an amateur 2) Hacks with malicious intent; illegal 3) Invited to find bugs before a product launches or attacks out of revenge 4) Hacks without permission, but not necessarily with malicious intent

Who was the co-founder of Google along with Larry Page in 1998?

In which network topology is every node connected to exactly two other nodes, forming a closed loop?

In Microsoft Word, the 'Thesaurus' feature is found under which tab?

Which of the following statements is/are true? [1] Registers are the fastest type of memory located inside the CPU. [2] Secondary memory is directly accessible by the CPU without any intermediate memory.

Who is recognized as the father of Artificial Intelligence?

CAPTCHA is used to provide security and protection from which of the following threats?