The IT Stuff

The basic difference between the two technologies lies in how they provide protection for network environments.
Intrusion Detection Systems, IDS, analyze network traffic and generate alerts when malicious activity is discovered.
The limitation of Intrusion Detection Systems is that they cannot preempt network attacks because IDS sensors are based on packet sniffing technologies that only watch network [...]

Try to detect intrusion attempts so that action may be taken to repair the damage later.
IDS device is passive, watching packets of data traverse the network from a monitoring port, comparing the traffic to configured rules, and setting off an alarm if it detects anything suspicious.
Intrusion Detection Systems, IDS, analyze network traffic and generate alerts [...]