A dictionary attack is a method used to break into a password-protected computer or server by systematically entering every word in a dictionary as a password. In the context of an authentication system that uses only 4- digit numeric passwords, a dictionary attack would involve trying all possible combinations of 4-digit numbers until the correct one is found.
Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course materials discuss various attack methods, including dictionary attacks, and how they can be used to compromise networks

Resource exhaustion is an evasion technique where an attacker overwhelms a system with a high volume of requests from multiple sources. This can cause the system to become overloaded and unable to process legitimate traffic, potentially allowing the attacker to bypass security measures like intrusion detection systems.
References := The answers are based on the knowledge from the Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course material, which covers various cybersecurity concepts, including file identification methods, application control technologies, firewall utilities, and evasion techniques

Corroborative evidence is the type of evidence that supports a theory or an assumption that results from initial evidence. It provides additional support to the initial findings, strengthening the theory or assumption by confirming the same facts or pointing towards the same conclusion with independent pieces of evidence4567.
References := Types of evidence (article) | Lessons | Khan Academy, Evidence: Fundamental Concepts and the Phenomenal Conception, Navigating Scientific Evidence: Types and Definitions, How Courts Work - American Bar Association