To block applications irrespective of their port, the security device must first accurately identify the application traffic. Application Identification (APPID) is the Juniper Networks feature that inspects traffic and identifies applications based on their unique signatures. Once the application is identified by APPID, the Application Firewall (AppFW) feature is used to enforce a security policy. AppFW allows administrators to create rules to permit, deny, or reject traffic based on the identified application, thus fulfilling the requirement to block malicious applications.

B. AppQoE: Application Quality of Experience (AppQoE) is used to prioritize and manage application performance to meet service level agreements (SLAs), not for blocking malicious traffic.

D. AppTrack: Application Tracking (AppTrack) is a visibility tool that logs and reports on application traffic identified by APPID. It provides monitoring capabilities but does not enforce blocking policies.

1. Juniper Networks TechLibrary

Application Identification (AppID) Overview: "AppID identifies applications and is used by other security features

such as application firewall

application tracking

and application quality of service (AppQoE)

to provide better visibility and control over your network." This shows AppID is the foundational identification engine.

2. Juniper Networks TechLibrary

Application Firewall Overview: "Application firewall (AppFW) provides application-aware security policy enforcement... You can define rules within a policy to permit

deny

or reject traffic based on the application." This confirms AppFW is the enforcement mechanism for blocking.

3. Juniper Networks TechLibrary

Application Tracking Overview: "Application tracking (AppTrack) collects data for tracked applications and provides information about traffic flows... AppTrack does not block traffic; it only reports on traffic that is permitted by the current security policy." This explicitly states AppTrack is for reporting

not blocking.

4. Juniper Networks TechLibrary

Application Quality of Experience (AppQoE) Overview: "AppQoE measures and monitors the traffic for specific applications and then applies the configured traffic-handling rules to meet the service-level agreement (SLA) requirements." This defines AppQoE's role as performance management.