An intranet is a private network which is heavily protected by many different networking devices, such as router, firewall, proxy server, honeynet, IPS and IDS. This diagram is an overly-simplified version of the reality. I try to put these devices together in a reasonable order, only for teaching and learning purpose. IDS and IPS are two networking security devices. IDS stands for Intrusion-detection system.IPS stands for Intrusion Prevention System. They play different roles and work together to protect a local area network. In this video, you will learn what they are and what are their main functions. This is my education channel. My topics cover networking, security, cyber threats and defense, and other computer-related materials. Please subscribe my channel.