Juniper JN0-232 Online Practice Questions and Exam Preparation

Juniper JN0-232 Online Questions & Answers

• Question 81:

  You run show security flow session while troubleshooting. What information does this command provide? (Choose two.)

  A. The total active time of the session.
  B. The end-to-end data path that packets are taking.
  C. The IP address of the host that initiates the session.
  D. The security policy name that is controlling the session.
  A. The total active time of the session.
  D. The security policy name that is controlling the session.

  ---

  The session table shows timers and policy name, not full path tracing.

• Question 82:

  When configuring antispam, where do you apply local lists?

  A. custom objects
  B. advanced security policy
  C. antispam feature-profile
  D. antispam UTM policy
  D. antispam UTM policy

  ---

  Local sender/recipient lists must be attached to the antispam UTM policy.

• Question 83:

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

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

  ---

  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 ofsecurity policiesfor 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.

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

• Question 84:

  Which two statements about NAT are correct? (Choose two.)

  A. When multiple NAT rules have overlapping match conditions, the most specific rule is chosen.
  B. Source NAT translates the source IP address of a packet.
  C. Source NAT translates the source port and destination IP address.
  D. When multiple NAT rules have overlapping match conditions, the rule listed first is chosen.
  A. When multiple NAT rules have overlapping match conditions, the most specific rule is chosen.
  B. Source NAT translates the source IP address of a packet.

• Question 85:

  You are troubleshooting traffic traversing the SRX Series Firewall and require detailed information showing how the flow module is handling the traffic. How would you accomplish this task?

  A. Review the flow session table.
  B. Review the forwarding table.
  C. Enable flow trace options.
  D. Enable firewall filters.
  C. Enable flow trace options.

  ---

  When troubleshooting packet handling on an SRX Series device, administrators need to understand exactly how theflow moduleis processing traffic. The most effective tool for this is theflow traceoptions feature.

  Flow traceoptions:Provides detailed per-packet trace information showing each processing step within the flow module. It reveals how traffic is evaluated against session tables, NAT rules, and security policies. This is the recommended method for in-depth troubleshooting.

  Why not the others?

  Theflow session table(Option A) shows only active sessions and counters, not detailed step-by-step handling. Theforwarding table(Option B) relates to routing and forwarding decisions, not flow security processing.

  Firewall filters(Option D) can match and log traffic but do not display detailed flow processing

  steps.

  Therefore, the correct method to get detailed information about flow handling is toenable flow traceoptions.

  Juniper Networks Monitoring and Troubleshooting with Flow Traceoptions, Junos OS Security Fundamentals, Official Course Guide.

• Question 86:

  By default, revenue interfaces are placed into which security zone?

  A. trust
  B. null
  C. untrust
  D. junos-trust
  C. untrust

  ---

  All "revenue" (data-plane) interfaces default to untrust zone.

• Question 87:

  What are three Junos UTM features? (Choose three.)

  A. screens
  B. antivirus
  C. Web filtering
  D. IDP/IPS
  E. content filtering
  B. antivirus
  C. Web filtering
  E. content filtering

  ---

  UTM includes antivirus, Web filtering, and content filtering--not screens or IDP.

• Question 88:

  You are deploying an SRX Series firewall with multiple NAT scenarios. In this situation, which NAT scenario takes priority?

  A. interface NAT
  B. source NAT
  C. static NAT
  D. destination NAT
  A. interface NAT

  ---

  This is because the interface NAT would allow the connections to pass through the firewall - and thus, would ensure that the appropriate ports are open in order to allow for the connections to be established. This is a really important step in order to ensure that all of the appropriate traffic is allowed through the SRX Series firewall - and thus, it must be a priority when deploying the firewall.

• Question 89:

  You are asked to allow only ping and SSH access to the security policies shown in the exhibit.

  

  Which statement will accomplish this task?

  A. Rename policy Rule-2 to Rule-0.
  B. Insert policy Rule-2 before Rule-1.
  C. Replace application any with application [junos-ping junos-ssh] in Rule-1.
  D. Rename policy Rule-1 to Rule-3.
  C. Replace application any with application [junos-ping junos-ssh] in Rule-1.

  ---

  Changing the application set to only include ping + SSH enforces required restriction.

• Question 90:

  An application firewall processes the first packet in a session for which the application has not yet been identified. In this scenario, which action does the application firewall take on the packet?

  A. It allows the first packet.
  B. It denies the first packet and sends an error message to the user.
  C. It denies the first packet.
  D. It holds the first packet until the application is identified.
  D. It holds the first packet until the application is identified.

  ---

  This is necessary to ensure that the application firewall can properly identify the application and the correct security policies can be applied before allowing any traffic to pass through.

  If the first packet was allowed to pass without first being identified, then the application firewall would not know which security policies to apply - and this could potentially lead to security vulnerabilities or breaches. So it's important that the first packet is held until the application is identified.