Juniper JN0-232 Online Practice Questions and Exam Preparation

Juniper JN0-232 Online Questions & Answers

• Question 21:

  Which statement is correct about source NAT?

  A. It translates MAC addresses to private IP addresses.
  B. It translates private IP addresses to public IP addresses.
  C. It performs bidirectional IP address translation.
  D. It performs translation on ingress traffic only.
  B. It translates private IP addresses to public IP addresses.

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  Source NAT (Network Address Translation) is used on SRX devices to allow hosts with private IP addresses to access external networks, such as the Internet. The SRX translates theprivate IP address of the source host into a public IP addressbefore forwarding traffic toward the destination.

  It does not translate MAC addresses (Option A).

  NAT is unidirectional in this case: it specifically translates private-to-public in the outbound direction,

  while the reverse (return traffic) is handled automatically through the session table. It is not a

  bidirectional translation (Option C).

  NAT processing occurs as part of the flow module, not limited only to ingress traffic (Option D). Therefore, the correct statement is that source NAT translatesprivate IP addresses to public IP addresses.

  Juniper Networks Junos OS Security Fundamentals, NAT Concepts and Source NAT Processing.

• Question 22:

  Click the Exhibit button.

  

  Which two statements are correct about the content filter shown in the exhibit? (Choose two.)

  A. .exe files will not be allowed to be uploaded over HTTP.
  B. .exe files will not be allowed to be downloaded over HTTP.
  C. There will be a notice added to the SRX log file about the file being blocked.
  D. There will be an e-mail sent to the user about why the SRX is blocking the file.
  B. .exe files will not be allowed to be downloaded over HTTP.
  C. There will be a notice added to the SRX log file about the file being blocked.

  ---

  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 thedownload direction, not upload. Uploads of .exe files are unaffected.

  Option B: Correct. Because the rule applies todownloads, .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

  Juniper Networks UTM Content Filtering Configuration and Actions, Junos OS Security Fundamentals, Official Course Guide.

• Question 23:

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

  A. Screens process inbound packets.
  B. Screens are processed on the routing engine.
  C. Screens process outbound packets.
  D. Screens are processed on the flow module.
  A. Screens process inbound packets.
  D. Screens are processed on the flow module.

  ---

  Screens (DoS protection) run on the flow module and act on inbound traffic.

• Question 24:

  What is the purpose of rate-limiting exception traffic in the Junos OS?

  A. to enhance the performance of the forwarding plane
  B. to simplify the configuration of network interfaces
  C. to prevent denial-of-service attacks on the Routing Engine
  D. to manage routing protocols and updates
  C. to prevent denial-of-service attacks on the Routing Engine

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  Exception traffic is traffic that must be sent from the Packet Forwarding Engine (PFE) to the Routing Engine (RE) for processing, such as routing protocol updates, management traffic, or other control-plane packets. Because the RE is a limited and critical resource, Junos OS implementsrate limiting on exception traffic.

  The purpose is toprevent denial-of-service (DoS) attacks on the Routing Engineby controlling the amount of traffic directed to it.

  This ensures the RE continues to process control-plane operations reliably, even under potential attack or heavy traffic conditions.

  Rate limiting does not enhance forwarding plane performance (Option A), simplify interface configuration (Option B), or manage routing protocols directly (Option D).

  Juniper Networks Junos OS Security Fundamentals, Exception Traffic Handling.

• Question 25:

  What are two Juniper ATP Cloud feed analysis components? (Choose two.)

  A. IDP signature feed
  B. CandC cloud feed
  C. infected host cloud feed
  D. US CERT threat feed
  B. CandC cloud feed
  C. infected host cloud feed

  ---

  ATP Cloud analyzes botnet CandC activity and infected host behavior.

• Question 26:

  What are two characteristics of a null zone? (Choose two.)

  A. The null zone is configured by the super user.
  B. By default, all unassigned interfaces are placed in the null zone.
  C. All ingress and egress traffic on an interface in a null zone is permitted.
  D. When an interface is deleted from a zone, it is assigned back to the null zone.
  B. By default, all unassigned interfaces are placed in the null zone.
  D. When an interface is deleted from a zone, it is assigned back to the null zone.

  ---

  Null zone is system-defined; unassigned interfaces belong here and return here when removed.

• Question 27:

  You want to verify the peer before IPsec tunnel establishment. What is used as a final check?

  A. traffic selector
  B. perfect forward secrecy
  C. st0 interfaces
  D. proxy ID
  D. proxy ID

  ---

  Proxy IDs (Phase 2 selectors) must match for tunnel establishment.

• Question 28:

  What is the correct order of processing when configuring NAT rules and security policies?

  A. static NAT - destination NAT - policy lookup - source NAT
  B. source NAT - static NAT - destination NAT - policy lookup
  C. destination NAT - policy lookup - source NAT - static NAT
  D. policy lookup - source NAT - static NAT - destination NAT
  C. destination NAT - policy lookup - source NAT - static NAT

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  Packet flow order: destination NAT - policy lookup - source NAT - static NAT.

• Question 29:

  What is the purpose of a feature profile in a UTM configuration?

  A. It applies a UTM feature to a security policy.
  B. It applies a UTM feature to protocol traffic.
  C. It defines the operation of a specific UTM feature.
  D. It defines an object list.
  C. It defines the operation of a specific UTM feature.

  ---

  Afeature profilein a UTM (Unified Threat Management) configuration defines how a specific UTM feature should operate. Examples include: Anantivirus feature profilethat specifies the type of scanning to perform (streaming or full file-based). Aweb filtering feature profilethat defines filtering methods, categories, and actions. Anantispam profilethat defines how spam detection and actions are performed.

  Feature profiles do not directly apply to traffic or policies. Instead, they arereferenced inside a UTM policy, and then that policy is applied to a security policy.

  Therefore, a feature profile's purpose is todefine the operation of a specific UTM feature.

  Juniper Networks Junos OS Security Fundamentals, UTM Profiles and Policies.

• Question 30:

  You want to integrate an SRX Series device with Juniper ATP Cloud. What is the first action to accomplish this task?

  A. Issue the commit script to register the SRX Series device.
  B. Create an account with the Juniper ATP Cloud Web UI.
  C. Copy the operational script from the Juniper ATP Cloud Web Ul.
  D. Create the SSL VPN tunnel between the SRX Series device and Juniper ATP Cloud.
  B. Create an account with the Juniper ATP Cloud Web UI.