Which tool can be used to monitor network traffic for suspicious activity?

An intrusion detection system (IDS) is specifically designed to monitor network traffic and identify suspicious or malicious activity. It analyzes the data packets flowing across the network to detect patterns or signatures that are characteristic of known threats or unauthorized access attempts. This capability is crucial for maintaining the security of a network, as it enables organizations to respond quickly to potential security breaches, mitigate risks, and enhance overall network security.

Theother tools listed serve different purposes. A network firewall is primarily focused on controlling incoming and outgoing traffic based on predetermined security rules, rather than actively monitoring for suspicious activity. A disk cleanup tool is designed to optimize storage by removing unnecessary files and has no relevance to network monitoring. A virtual private network (VPN) is used to create secure connections over the internet, enhancing privacy and security for users but does not monitor network activity for signs of threats.