Key details for this exam, checked against the published exam outline
Each question shows the correct answer and an explanation of why it is right
Click the Exhibit button.
Referring to the exhibit, which statement is correct?
Juniper SRX evaluates security policies in order, top to bottom. The first matching policy determines the action, and no further policies are evaluated. This behavior can lead to shadowed policies if later policies match the same conditions as earlier ones.
From the exhibit:
Policy1: Matches application junos-http and permits traffic.
Policy2: Matches application junos-https and permits traffic.
Policy3: Matches application junos-http again, but denies traffic.
Since policy1 already matches all HTTP traffic and permits it, traffic never reaches policy3. This makes policy3 shadowed because it has the same match condition as policy1 but is evaluated later in the list.
Other options:
Policy1 is not shadowed because it is evaluated first.
Policy2 is independent (application = HTTPS) and therefore unaffected.
Only policy3 is shadowed by policy1.
Correct Statement: Policy3 will be shadowed because it matches the same application as policy1.
What are two purposes of configuring application sets? (Choose two.)
Application sets are used to group multiple predefined or custom applications under one named object. Juniper documentation states that an application or application set can be referenced by security policies as match criteria for session-initiating packets. This allows administrators to simplify policy configuration by matching one application-set object instead of listing many individual applications. It also improves operational flexibility: if several policies reference the same application set, you can change the applications in that set without directly editing every policy rule. Application sets do not organize addresses; address sets perform that role. They also do not directly open dynamic ports during a session; that behavior is associated with application-level gateways and protocol handling, not the purpose of an application set.
Which two statements are correct about security zones? (Choose two.)
Option B: Correct. Interfaces in the same security zone must belong to the same routing instance; zones cannot span multiple routing instances.
Option D: Correct. A security zone can contain multiple interfaces, allowing grouping of similar trust levels (e.g., multiple LAN subnets in a trust zone).
Option A: Incorrect. An interface can belong to only one zone at a time.
Option C: Incorrect. Interfaces within the same zone cannot be split across routing instances.
Correct Statements: Interfaces in the same zone must share the same routing instance, and a zone can contain multiple interfaces.
When traffic enters an interface, which two results does a route lookup determine? (Choose two.)
When a packet enters an SRX interface, a route lookup is performed:
It determines the egress interface (Option B) by checking the destination IP against the routing table.
Once the egress interface is known, its associated egress security zone (Option D) is also determined.
The ingress interface (Option A) is already known when the packet arrives, so the route lookup does not determine it.
DNS name (Option C): DNS is unrelated to routing lookups.
Correct Results: egress interface, egress security zone
Click the Exhibit button.
The exhibit shows a table representing security policies from the trust zone to the untrust zone.
In this scenario, which two statements are correct? (Choose two.)
Juniper SRX evaluates security policies sequentially from top to bottom. Once a policy match is found, no further policies are evaluated. In this exhibit:
First Policy (FTP, deny):
Source: 172.25.11.0/24
Destination: 10.1.0.0/16
Application: FTP
Action: deny
Any FTP traffic from 172.25.11.0/24 to 10.1.0.0/16 is denied.
Second Policy (SSH, permit):
Same source/destination but application = SSH
Action = permit
SSH traffic from 172.25.11.0/24 to 10.1.0.0/16 is permitted.
Third Policy (HTTPS, permit):
HTTPS from the same source/destination is permitted.
Fourth Policy (Ping, permit):
Source: 172.25.11.0/24 to any destination
Application: ping
Action: permit
ICMP echo requests (ping) from 172.25.11.0/24 to any destination are permitted.
Fifth Policy (any any, deny):
Serves as a default deny all at the end.
Now checking each option:
Option A: SSH from 172.25.11.10 10.1.0.10 matches the SSH permit rule (second policy). Correct.
Option B: Ping from 172.25.11.100 10.1.0.10 matches the ping permit rule (fourth policy). This traffic is permitted, not denied. Incorrect.
Option C: FTP from 10.1.0.10 172.25.11.100 is reverse traffic (untrust to trust). The table applies only trust untrust, so this policy does not apply. Incorrect.
Option D: FTP from 172.25.11.11 10.1.0.10 matches the first policy (FTP deny rule). Correct.
Correct Statements: A, D
110 questions covering all exam domains, starting from $20
6 domains from the Juniper JN0-232 exam outline, with approximate weightings. Every sample question above is tagged with the domain it comes from
Understand the foundational architecture and capabilities of SRX devices, including their role as unified threat management platforms. Learn about interfaces, hardware specifications, initial configuration, and the packet flow through security processing stages. Covers both physical SRX Series devices and the Juniper vSRX Virtual Firewall.
Master the core building blocks of security configuration on Junos OS. Study security zones, screen configurations for attack prevention, address objects for traffic identification, and application definitions including Application Layer Gateways that inspect and control specific application protocols.
Design and implement access control rules that protect network resources. Understand zone-based policies that control traffic between security zones, global policies that apply across the device, and unified security policies that provide a streamlined configuration model. Learn how policies determine which traffic is allowed or denied.
Configure IP address translation to manage address space and enhance security. Study source NAT to hide internal addresses, destination NAT to expose internal services to external networks, and static NAT for one-to-one address mapping. Learn when and why each translation type is used in network design.
Deploy unified threat management features to inspect and control traffic content. Implement content filtering to block unwanted material categories, web filtering to restrict web access, antivirus scanning to detect malicious files, and antispam to filter email threats. These features work together to protect against modern network threats.
Diagnose and resolve security issues using Junos OS tools and logs. Troubleshoot security policies to ensure traffic flows as intended, validate configured behaviors to confirm the device operates correctly, and monitor packet flow through the security processing pipeline. Learn to interpret logs and use command-line diagnostics to identify problems.
Common questions about the exam itself
