Final answer:
Tailgating is when an unauthorized user follows an authorized user into a restricted area. This can happen physically or digitally, and it is important to practice good security measures to prevent it.
Step-by-step explanation:
Tailgating is when an unauthorized user follows an authorized user into a restricted area. This is a physical security breach where the unauthorized user takes advantage of the trust that the authorized user has gained. For example, if an employee swipes their access card to enter a secure room and someone follows closely behind without authorization, it is considered tailgating.
Tailgating can also occur in the digital world, where hackers trick authorized users into granting them access to restricted areas. This can happen through phishing attacks, where hackers send fraudulent emails or create fake websites to lure users into providing their login credentials.
It is important to practice good security measures such as not sharing access cards or credentials, being mindful of who is entering restricted areas, and being cautious of suspicious emails or websites.