What distinguishes a close-in attack?

A close-in attack is characterized by the attacker being physically near the target system. This proximity enables the attacker to utilize various methods that may not be possible from a remote location, such as directly connecting to the target's network or device, using physical access to install malicious hardware, or employing other techniques that require being close to the target. This physical presence can significantly enhance the attacker's ability to execute their plans, making close-in attacks particularly dangerous.

The other options do not accurately describe a close-in attack. For example, remaining anonymous and conducting the attack online are typical characteristics of remote attacks. Being far from the target would not allow the attacker to exploit physical access effectively. Thus, physical proximity is the defining feature of close-in attacks, differentiating them from various forms of remote attacks.