Security, Associate (JNCIA-SEC) Exam Questions PDF download

QUESTION: 17

Your company is acquiring a smaller company that uses the same private address range that your company currently uses in its North America division. You have a limited number of public IP addresses to use for the acquisition. You want to allow the new acquisition's users to connect to the existing services in North America.
Which two features would you enable on your SRX Series Firewall to accomplish this task? (Choose two.)

Answer(s): B,D

Explanation:

When two networks use the same private IP address ranges, conflicts occur. The solution is to use address translation techniques on the SRX:
NAT (Network Address Translation): Translates private IP addresses to another IP range, enabling connectivity between overlapping private networks.
PAT (Port Address Translation): Extends NAT by allowing multiple private IPs to share one or a few public IPs using different port numbers. This is especially useful when there is a limited pool of public IP addresses.
Other options:
IDP (Option A): Intrusion Detection and Prevention, unrelated to address overlap.
BGP (Option C): A routing protocol, but it does not solve overlapping IP addressing problems.
Correct Features: NAT and PAT

Reference:

Juniper Networks – NAT and Address Overlap Solutions, Junos OS Security Fundamentals.

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QUESTION: 18

You want to confirm that your SRX Series Firewall is connected to the SBL server.
Which operational mode command would you use in this scenario?

show security utm anti-virus status
show security web filtering status
show security utm content-filtering statistics
show security utm anti-spam status

Answer(s): B

Explanation:

The SBL (SurfControl Web Filtering) server integration is part of UTM web filtering on SRX. To confirm that the firewall is properly connected and communicating with the SBL server, the command used is:
show security web filtering status
This command displays connectivity information with the SBL server, license status, and filtering operations.
Other options:
Anti-virus (Option A) checks antivirus engine status.
Content-filtering statistics (Option C) shows local content filtering counters.
Anti-spam status (Option D) checks spam engine connectivity.
Correct Command: show security web filtering status

Reference:

Juniper Networks – UTM Web Filtering Operational Commands, Junos OS Security Fundamentals.

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QUESTION: 19

Which two statements about the null zone on an SRX Series Firewall are correct? (Choose two.)

Transit interfaces are assigned to the null zone by default.
Traffic rejected by the security policy is sent to the null zone for logging.
The null zone can be configured to accept traffic to or from the SRX Series Firewall.
A logical interface configured in a security zone removes it from the null zone.

Answer(s): A,D

Explanation:

Default assignment: All logical interfaces are placed in the null zone by default until explicitly assigned to a user-defined security zone (Option A is correct).
Removal from null zone: Once an interface is assigned to a security zone, it is removed from the null zone (Option D is correct).
No traffic acceptance: The null zone is a discard zone; it cannot be configured to accept any traffic (Option C is incorrect).
Policy behavior: Traffic rejected by a security policy is dropped according to the policy action. It is not forwarded to the null zone for logging (Option B is incorrect).
Correct Statements: A and D

Reference:

Juniper Networks – Security Zones and the Null Zone, Junos OS Security Fundamentals.

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QUESTION: 20

What is the purpose of assigning logical interfaces to separate security zones in Junos OS?

to simplify the configuration of network interfaces
to manage routing protocols and updates
to control traffic that traverses different VLANs using security policies
to enable network monitoring through SNMP

Answer(s): C

Explanation:

In Junos OS, security zones are the foundation of SRX firewall policy enforcement. Logical interfaces must be assigned to zones. This enables:
Separation of traffic by zone boundaries.
Enforcement of security policies for traffic traversing between zones.
Control of traffic across VLANs, subnets, or functional areas (e.g., trust, untrust, DMZ).
Other options:
Zone assignment is not used to simplify interface configuration (A).
Routing protocols and updates (B) are handled by routing instances, not zones.
SNMP monitoring (D) is enabled under system or services configuration, not zones.

Reference:

Juniper Networks – Security Zones and Policy Enforcement, Junos OS Security Fundamentals.

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QUESTION: 21

Which two statements are correct about security zones on an SRX Series device? (Choose two.)

Security zones can be shared between routing instances.
Security zones cannot be shared between routing instances.
Intrazone and interzone traffic both require security policies.
Multiple security zones cannot be configured on an SRX Series device.

Answer(s): B,C

Explanation:

Routing instances: Security zones are local to their routing instance. They cannot be shared between routing instances (Option B is correct). Each routing instance must define its own zones.
Intrazone and interzone traffic: Both types of traffic require policies in Junos OS. Intrazone traffic must have an explicit intra-zone policy to be controlled (Option C is correct).
Sharing zones: Option A is incorrect, as zones cannot span routing instances.
Multiple zones: SRX devices fully support multiple security zones (trust, untrust, DMZ, etc.). Option D is incorrect.
Correct Statements: B and C

Reference:

Juniper Networks – Security Zones and Routing Instances, Junos OS Security Fundamentals.

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QUESTION: 22

Which two criteria would be used for matching in security policies? (Choose two.)

MAC address
source address
interface name
applications

Answer(s): B,D

Explanation:

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

Reference:

Juniper Networks – Security Policy Match Conditions, Junos OS Security Fundamentals.

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QUESTION: 23

Which two characteristics of destination NAT and static NAT are correct? (Choose two.)

Static NAT automatically creates a matching rule for the opposite direction.
Destination NAT requires address range sizes that match the devices being translated.
Static NAT uses Port Address Translation.
Destination NAT supports port forwarding.

Answer(s): A,D

Explanation:

Static NAT: Provides a one-to-one bidirectional mapping between internal and external IP addresses.
When configured, the translation automatically applies in both directions (Option A is correct). It does not use Port Address Translation (Option C is incorrect).
Destination NAT: Allows external clients to access internal resources by translating the destination address. It supports port forwarding so specific services (e.g., HTTP on port 80) can be forwarded to an internal host (Option D is correct). It does not require equal-sized address ranges (Option B is incorrect).
Correct Characteristics: Static NAT is bidirectional, and Destination NAT supports port forwarding.

Reference:

Juniper Networks – NAT Types and Characteristics, Junos OS Security Fundamentals.

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QUESTION: 24

Click the Exhibit button.

Referring to the exhibit, which statement is correct?

policy3 will be shadowed because it matches the same application as policy1. B. None of the policies will be shadowed. C. policy1 will be shadowed because it matches the same application as policy3. D. policy2 will be shadowed because it matches the same application as policy1.

Answer(s): A

Explanation:

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.

Reference:

Juniper Networks – Security Policy Evaluation Order and Shadowed Policies, Junos OS Security Fundamentals.

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Juniper Security, Associate (JNCIA-SEC) JN0-232 Dumps in PDF

Free Juniper JN0-232 Real Questions (page: 13)

QUESTION: 17

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