Final answer:
Server overload is the correct answer as it describes a situation where a target server can't handle additional requests due to being overwhelmed by too many simultaneous requests.
Step-by-step explanation:
To prevent the target server from being able to handle additional requests, the correct answer is A. Server overload. This condition occurs when a server receives more requests than it can handle due to limited resources. This can lead to slow response times, errors, and in severe cases, a server crash as the system becomes overwhelmed. However, the primary goal of a server overload is to exhaust server resources, not to damage or compromise the server's integrity as server compromise would suggest. Meanwhile, server crash is a result of the server being overloaded to the point of ceasing function. Server protection is the process of safeguarding a server against such events through various measures such as load balancers, firewalls, and DDoS mitigation techniques.