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[General] JN0-232 Study Guide Pdf - JN0-232 Exam Registration

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【General】 JN0-232 Study Guide Pdf - JN0-232 Exam Registration

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Juniper Security, Associate (JNCIA-SEC) Sample Questions (Q26-Q31):NEW QUESTION # 26
What is the purpose of rate-limiting exception traffic in the Junos OS?
  • A. to simplify the configuration of network interfaces
  • B. to enhance the performance of the forwarding plane
  • C. to prevent denial-of-service attacks on the Routing Engine
  • D. to manage routing protocols and updates
Answer: C
Explanation:
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).
Reference:Juniper Networks -Junos OS Security Fundamentals, Exception Traffic Handling.

NEW QUESTION # 27
Click the Exhibit button.

You must ensure that sessions can only be established from the external device.
Referring to the exhibit, which type of NAT is being performed?
  • A. static NAT and source NAT
  • B. static PAT only
  • C. destination NAT only
  • D. source NAT only
Answer: C
Explanation:
From the exhibit:
* The internal host (172.25.11.101) is located in theTrust zone.
* The external address (203.0.113.199/30) is used for communication with the ISP.
* The requirement is thatsessions can only be initiated from the external device(the ISP or untrust side) toward the internal host.
This requirement matches the behavior ofDestination NAT:
* Destination NAT only (Option A):Maps the external/public IP (203.0.113.199) to the internal/private IP (172.25.11.101). This allows inbound connections to be translated and sent to the internal host. The internal host cannot initiate outbound sessions, since the translation only applies to inbound traffic.
* Source NAT only (Option B):Used for outbound sessions from internal private IPs to the Internet.
This does not meet the requirement.
* Static PAT (Option C):Maps a single port of a public IP to a private IP/port. The exhibit does not indicate a port-based translation.
* Static NAT and source NAT (Option D):Would provide bidirectional communication, allowing sessions to be initiated in both directions. This contradicts the requirement.
Correct NAT Typeestination NAT only
Reference:Juniper Networks -NAT Types (Source NAT, Destination NAT, Static NAT), Junos OS Security Fundamentals.

NEW QUESTION # 28
A new packet arrives on an interface on your SRX Series Firewall that is assigned to the trust security zone.
In this scenario, how does the SRX Series Firewall determine the egress security zone?
  • A. by examining the destination port
  • B. by performing a route lookup
  • C. by performing a session lookup
  • D. by examining the ingress security zone properties
Answer: B
Explanation:
When a new packet arrives that does not match an existing session, the SRX performs full flow-based processing. After ingress zone determination, the firewall must know the destination zone to evaluate security policies.
* The SRX determines theegress zone by performing a route lookupon the packet's destination IP address.
* The routing decision identifies the outgoing interface, and the zone associated with that interface becomes theegress zone.
* Session lookup (Option A) happens first but is only useful for existing sessions.
* Destination port (Option B) is used for application identification, not zone determination.
* Ingress zone properties (Option D) cannot determine the egress zone.
Reference:Juniper Networks -SRX Series Flow Processing and Security Zone Determination, Junos OS Security Fundamentals.

NEW QUESTION # 29
You have a situation where legitimate traffic is incorrectly identified as malicious by your screen options.
In this scenario, what should you do?
  • A. Increase the sensitivity of the screen options.
  • B. Discard the traffic immediately.
  • C. Enable all screen options.
  • D. Use the alarm-without-drop configuration parameter.
Answer: D
Explanation:
Screen options are used to detect and prevent attacks such as floods, scans, and malformed packets. In some cases,false positivesmay occur, where legitimate traffic is mistakenly identified as malicious.
* To address this, administrators can configure thealarm-without-dropoption (Option D). This setting generates alarms/logs for suspicious traffic without actually dropping it, allowing verification before taking further action.
* Enabling all screen options (Option A) may increase false positives further.
* Discarding traffic immediately (Option B) risks disrupting legitimate communication.
* Increasing sensitivity (Option C) worsens the problem, since false positives would increase.
Correct Action:Use alarm-without-drop to log the traffic without dropping it.
Reference:Juniper Networks -Junos OS Screen Options and Troubleshooting, Junos OS Security Fundamentals.

NEW QUESTION # 30
Which two statements about management functional zones are correct? (Choose two.)
  • A. The management functional zone is automatically created on the SRX Series Firewalls.
  • B. The management functional zone is used to control the management-related traffic that is allowed to access your device.
  • C. The management functional zone contains all available revenue ports until they are assigned to a user- defined security zone.
  • D. The management functional zone cannot be referenced in any security policies.
Answer: A,B
Explanation:
Themanagement functional zoneon SRX devices is a special predefined zone with unique characteristics:
* It isautomatically created(Option C) and cannot be deleted.
* It is used specifically formanagement-related traffic(Option A), such as SSH, Telnet, web management (J-Web), SNMP, and other control-plane services.
* It does not contain revenue (data) interfaces (Option B is incorrect). Interfaces must be explicitly configured into user-defined zones.
* The management zone can be referenced in policies if inter-zone communication involving management traffic is needed (Option D is incorrect).
Correct Statements:A and C
Reference:Juniper Networks -Security Zones and Management Functional Zone, Junos OS Security Fundamentals.

NEW QUESTION # 31
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Posted at 7 hour before        Only Author  2#
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