Write short note on intrusion detection.

Intrusion detection is like a security guard for computer systems. Its main job is to catch any sneaky attempts by unauthorized users trying to break into a system or application.

Imagine your computer as a fortress, and an intrusion detection system is like a watchful guardian. This system, whether it’s a piece of software or hardware, is designed to spot and alert you about any unwelcome attempts to access your precious data.

If someone tries to break in, the intrusion detection system acts like an alarm. The faster it detects the intrusion, the better chance there is to kick the intruder out before they cause any harm or mess with your data.

Even if the alarm doesn’t catch the intruder in the act, the sooner you find out about the breach, the quicker you can limit the damage and get things back to normal.

Think of it as a protective shield – a good intrusion detection system acts as a barrier against unauthorized access. It’s not just about catching intruders; it also helps gather information on their tactics. This intel can be used to make the security measures even stronger, like upgrading the castle walls after learning about the latest tricks invaders use.