Final answer:
Hardening a site involves implementing defensive measures to reduce system vulnerability, such as deploying firewalls, using secure protocols, and implementing access controls.
Step-by-step explanation:
Hardening a site means taking extraordinary measures to reduce a system's vulnerability. It refers to the process of securing a website or system by implementing various defensive measures to protect against potential attacks and unauthorized access. Hardening measures may involve deploying robust firewalls, using secure protocols, ensuring regular software updates and patches, implementing strong access controls, and regularly monitoring and auditing the system for any vulnerabilities or suspicious activities.