Answer to Question #224215 in Computer Networks for Baudouin

Question

Choose ONE of the below security topics from chapter 22 of the Dordal (2019) course text. Research the topic, then provide a summary of the technology and how it works. Please use one additional outside source from the Internet to support your findings.

1. Network Intrusion Detection
2. Secure Shell (SSH)
3. Transport Layer Security (TLS)
4. Public Key Encryption

Note any areas where you may want or need some further explanation. Ask questions of your fellow classmates.

Answer 1

Network Intrusion Detection system is an independent platform that examines network traffic patterns to identify intrusion for an entire network. NIDS are devices that are distributed within networks that passively inspect traffic traversing the devices on which they sit. The NIDS can be software_based or hardware_based systems depending on the manufacturer of the system. The NIDS have two network interface whereby one is used for listening to network conversation in promiscuous mode while the other one for control and reporting. When there are many NIDS vendors, all systems tend to function one of two ways; where the NIDS are either anomaly based or signature based systems. The advantage of the NIDS is high speed, network DAT overload and signature development lag time.