Juniper Security, Associate (JNCIA-SEC) JN0-232 Exam Dumps: Updated Questions & Answers (July 2026)

A Junos custom application is a security policy object used when a predefined Junos application does not match the traffic requirement. To create one, you must define an application name, the transport protocol, and port information such as the destination port. Juniper documentation describes custom application attributes as including the name, transport protocol, and source or destination port numbers for TCP or UDP applications. The security policy itself is not a required attribute of the custom application object; it is where the object is later referenced. The source address is also not part of defining the application object. Therefore, the valid requirements are the port number, application name, and protocol.

Zone-based security policies are configured in a context that includes both a source zone and a destination zone. Juniper describes this policy context as from-zone to to-zone, and traffic is classified by matching source zone, destination zone, source address, destination address, and application. Option B is therefore correct. Screens are applied earlier in flow processing than policy evaluation, so option A is incorrect. Security policy lookup is part of first path processing when a session is created; once the session exists, fast path traffic normally follows the established session rather than re-evaluating policy for every packet. Option D is also incorrect because zone-based policies can apply to both intra-zone and inter-zone traffic, depending on the configured context.

Unified security policies use AppID to classify and control applications based on Layer 7 inspection, including applications nested within trusted services such as HTTP. Juniper documentation states that AppID identifies dynamic or real-time Layer 4 through Layer 7 applications and that dynamic applications can be added to unified security policy match criteria. To use AppID-based control, the SRX must have the required Application Identification feature license and application signature support. Dynamic application objects must then be referenced in the security policy so the firewall can match traffic by application identity rather than only by port or protocol. Unified policies do not have to be created only in the global zone, and disabling the default policy is not required.

From the exhibit, the content filter configuration is as follows:

Match Conditions:

Application: HTTP

Direction: download

File-types: exe

Action:

block

notification log

Analysis of Options:

Option A: Incorrect. The configuration specifies the download direction , not upload. Uploads of .exe files are unaffected.

Option B: Correct. Because the rule applies to downloads , .exe files will be blocked when users attempt to download them over HTTP.

Option C: Correct. The notification { log; } statement ensures that an entry will be added to the SRX device’s log when the action is triggered.

Option D: Incorrect. No configuration for sending e-mail notifications is shown in the rule. Only logging is specified.

Correct Statements: B and C

An SRX Series Firewall can operate in flow mode or packet mode. Flow mode is the normal security firewall mode, where the SRX analyzes traffic statefully, creates sessions, and applies services such as security policies, NAT, screens, and application security. Packet mode processes traffic on a per-packet basis and is stateless, making the SRX behave more like a router for selected forwarding functions. Juniper documentation specifically identifies these two operating modes for SRX Series Firewalls. Route mode is not an SRX firewall operating mode; routing is a forwarding function within Junos OS. Wireless mode is also not a firewall processing mode. Therefore, the correct answers are flow mode and packet mode.

The Packet Forwarding Engine is the forwarding-plane component responsible for high-speed packet handling. Juniper documentation states that the PFE performs Layer 2 and Layer 3 packet switching, route lookups, and packet forwarding. This makes option A correct because transit traffic is forwarded by the PFE rather than by the control plane. The Routing Engine manages and programs the PFE by building routing information and copying the forwarding table to the PFE, making option B correct. Option C reverses the relationship and is therefore incorrect. Option D is also incorrect because routing tables are created and maintained by the Routing Engine and routing protocol processes; the resulting forwarding information is then installed into the PFE for packet forwarding.

Adding interfaces (Option A): An interface must be assigned to a security zone before it can pass traffic. By default, interfaces are in the null zone and cannot send or receive traffic.

Exception traffic (Option B): Security zones define host-inbound-traffic settings, which determine what types of management or control-plane traffic (SSH, ICMP, SNMP) are permitted.

Routing instances (Options C and D): Security zones are specific to a routing instance and cannot include interfaces from multiple instances. Therefore, interfaces in the same zone cannot belong to different routing instances.

Correct Statements: A and B

When traffic matches a unified security policy, the SRX applies the action configured in that policy, such as permit, deny, reject, or redirect. Unified policies add AppID-based Layer 7 application matching to security policy processing, but they still behave like ordered firewall policies: once the matching policy is found, the firewall applies that policy action instead of continuing through additional policy entries. Juniper states that after AppID identifies the application and the matching policy is found, the actions are applied according to the policy. Option A is incorrect because AppID identifies the application before policy action is applied; the traffic is not merely “assigned” an application. Options B and D are incorrect because policy processing does not continue after a valid match.

Security policies in Junos OS match traffic based on specific criteria:

Source and destination addresses (Option B).

Application (Option D), which may be defined as services (e.g., tcp/80) or recognized through AppID.

Other options:

MAC addresses (Option A) are not used in policy matching; policies operate at Layer 3/4.

Interface name (Option C) is used in firewall filters, not in security policy definitions.

Correct Criteria: Source address and Applications

The correct command is show security utm web-filtering status. This operational mode command verifies whether the web-filtering service connection is up. For NGWF, the SRX sends URL or destination IP information to the Juniper NGWF cloud, where the URL is categorized and reputation information is returned to the device. Because NGWF depends on cloud connectivity, checking web-filtering status is the appropriate troubleshooting and verification step. The anti-spam and anti-virus status commands verify different Content Security services, and content-filtering statistics show content-filter counters rather than cloud web-filtering connectivity. Juniper documentation also notes that this command can confirm whether web filtering is down because of a missing license or service condition.