A denial of service (DoS) attack can potentially impact all customers within a cloud environment with the continued allocation of additional resources. Which of the following can be useful for a…

"Limits" typically restrict the maximum resources a customer can consume, which helps prevent one customer from consuming all resources, but doesn't guarantee a minimum for others in the face of a sustained attack unless those limits are very finely tuned and enforced for all customers.

Resource reservations in a cloud environment allow a customer to secure a guaranteed allocation of computing resources (e.g., CPU, memory, network bandwidth) for their services. This ensures that even if another customer's malicious activity or high demand (such as a DoS attack) causes resource exhaustion in the shared pool, the reserved resources for the protected customer remain available, preventing impact.

"Shares" typically refer to a proportional distribution of resources based on available capacity, meaning if total capacity is diminished by a DoS attack, the proportional share for other customers would also decrease.

"Borrows" is not a standard term for cloud resource allocation that provides DoS protection; it implies taking resources, which is the opposite of securing them.