Step 1: Understanding the Question:
The question asks us to align network security and web terms with their standard descriptions.
Step 2: Detailed Explanation:
Let us map each list element:
• Trojan (A): Disguises itself as legitimate utility software to trick users. Once downloaded, it executes malicious actions. This matches IV.
• Cookie (B): A small state-tracking data file generated by web servers and stored on the user's browser client. This matches III.
• Spyware (C): Malicious software that secretly tracks user interactions, logs keys, and shares the compiled information with third parties. This matches II.
• Firewall (D): A filter placed at network boundaries that evaluates traffic patterns against preconfigured rules to allow or block access. This matches I.
Step 3: Final Answer:
The correct matching sequence is A-IV, B-III, C-II, D-I, representing option (B).