A snapshot backup is a type of backup that captures the state of a system at a point in time. It is highly time- and storage-efficient because it only records the changes made to the system since the last backup. It also has no impact on production systems because it does not require them to be offline or paused during the backup process. Reference: https://www.comptia.org/blog/what-is-a-snapshot-backup

Spraying is a password attack that involves trying a few common passwords against a large number of usernames. Spraying is different from brute-force attacks, which try many possible passwords against one username, or dictionary attacks, which try a list of words from a dictionary file against one username. Spraying is often used when the web application has a lockout policy that prevents multiple failed login attempts for the same username. Spraying can be detected by looking for patterns of failed login attempts from the same source IP address with different usernames and the same or similar passwords.

Resource policies are cloud features that allow and deny access to specific features in order to increase data security. Resource policies are rules or statements that define what actions can be performed on a particular resource by which entities under what conditions. Resource policies can be attached to cloud resources such as virtual machines, storage accounts, databases, or functions. Resource policies can help enforce security best practices, compliance requirements, and cost management. Resource policies can also help implement the principle of least privilege, which grants users only the minimum level of access they need to perform their tasks.

Tailgating is a physical security threat that occurs when an unauthorized person follows an authorized person into a restricted area without proper identification or authorization. It can cause unauthorized individuals to roam the hallways after gaining access through badge readers installed for building access.

A supply chain attack is a type of attack that involves compromising a trusted third-party provider or vendor and using their products or services to deliver malware or gain access to the target organization. The attacker can exploit the trust and dependency that the organization has on the provider or vendor and bypass their security controls. In this case, the attacker may have tampered with the patch for the security appliance and used it to exfiltrate data from the organization.