What is an IDS?

An intrusion detection system (IDS) is a device or software application that monitors network or system activities for malicious activities or policy violations and produces electronic reports to a management station. IDS come in a variety of "flavors" and approach the goal of detecting suspicious traffic in different ways. There are network based (NIDS) and host based (HIDS) intrusion detection systems. NIDS is a network security system focusing on the attacks that come from the inside of the network (authorized users). Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system. Intrusion detection and prevention systems (IDPS) are primarily focused on identifying possible incidents, logging information about them, and reporting attempts. In addition, organizations use IDPSes for other purposes, such as identifying problems with security policies, documenting existing threats and deterring individuals from violating security policies. IDPSes have become a necessary addition to the security infrastructure of nearly every organization

IDS is a Intrusion Detection System(IDS), it is usually used in businesses. IDS monitors the network for any malicious activities or users that are violating the network usage policy. IDS have a broad number of uses and "flavours" to match the company's needs.

Intellect Data System (IDS) its a hotel industry software

An Intrusion Detection System (IDS) is a network security technology originally built for detecting vulnerability exploits against a target application or computer