Which of these is a significant advantage to deploying an IDS?

Deploying an Intrusion Detection System (IDS) offers the significant advantage of being able to catch attacks that make it through the firewall. Firewalls are designed to filter out unwanted traffic based on predefined rules, but they do not always have the capability to detect sophisticated attacks that might bypass these defenses. An IDS monitors network traffic for suspicious activity and can identify patterns or signatures that indicate an intrusion or an ongoing attack, alerting administrators to potential threats. By effectively identifying such instances, an IDS enhances an organization's overall security posture, addressing vulnerabilities that a firewall alone may not cover.

In contrast, the other options suggest capabilities that do not accurately reflect what an IDS can do. For instance, the assertion that IDS can block all incoming traffic refers more to the functionality of firewalls, not IDS. Similarly, the idea that an IDS can prevent all vulnerabilities is misleading, as it only monitors and alerts rather than prevent. Lastly, stating that IDS can replace the need for antivirus is incorrect, as IDS and antivirus systems serve different but complementary roles in network security.