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Juniper JN0-636 Exam Questions
Security, Professional (Page 3 )

Updated On: 25-Apr-2026
Page 3 of 24
PDF with 115 Questions

Exhibit



You have configured the SRX Series device to switch packets for multiple directly connected hosts that are within the same broadcast domain However, the traffic between two hosts in the same broadcast domain are not matching any security policies Referring to the exhibit, what should you do to solve this problem?

  1. You must change the global mode to security switching mode.
  2. You must change the global mode to security bridging mode
  3. You must change the global mode to transparent bridge mode.
  4. You must change the global mode to switching mode.

Answer(s): C

Explanation:

According to the exhibit, which is a configuration snippet of the SRX Series device, the global mode for the device is set to switching mode. This means that the device is operating as a Layer 2 switch and does not apply any security policies to the traffic between hosts in the same broadcast domain. Therefore, the traffic between two hosts in the same broadcast domain are not matching any security policies.
To solve this problem, the user should change the global mode to transparent bridge mode. This means that the device will operate as a Layer 2 transparent bridge and apply security policies to the traffic between hosts in the same broadcast domain. This will allow the user to enforce security policies based on the source and destination IP addresses, ports, and protocols of the traffic. To change the global mode to transparent bridge mode, the user should use the following command:
set protocols l2-learning global-mode transparent-bridge This command will set the global mode for the SRX Series device as Layer 2 transparent bridge mode. After changing the mode, the user must reboot the device for the configuration to take effect.


Reference:

1: global-mode (Protocols) 2: Configuring Layer 2 Transparent Mode



You are asked to deploy filter-based forwarding on your SRX Series device for incoming traffic sourced from the 10.10 100 0/24 network in this scenario, which three statements are correct? (Choose three.)

  1. You must create a forwarding-type routing instance.
  2. You must create and apply a firewall filter that matches on the source address 10.10.100.0/24 and then sends this traffic to your routing
  3. You must create and apply a firewall filter that matches on the destination address 10 10.100.0/24 and then sends this traffic to your routing instance.
  4. You must create a RIB group that adds interface routes to your routing instance.
  5. You must create a VRF-type routing instance.

Answer(s): A,B,D

Explanation:

According to the Juniper documentation, filter-based forwarding (FBF) is a technique that allows the SRX Series device to forward packets based on firewall filter rules, rather than the default routing table. FBF can be used to implement policy-based routing, load balancing, or traffic engineering.

To deploy FBF on the SRX Series device for incoming traffic sourced from the 10.10.100.0/24 network, the following steps are required:
You must create a forwarding-type routing instance. A forwarding-type routing instance is a special type of routing instance that is used for FBF. It does not have any interfaces or routing protocols associated with it, but it has its own routing table that can be populated by static routes, RIB groups, or routing policies. You can create a forwarding-type routing instance by using the following command:
set routing-instances <instance-name> instance-type forwarding You must create and apply a firewall filter that matches on the source address 10.10.100.0/24 and then sends this traffic to your routing instance. A firewall filter is a set of rules that can match on various packet attributes, such as source and destination addresses, ports, protocols, and so on. You can use the then routing-instance action to specify the routing instance that the packet should be forwarded to. You can create and apply a firewall filter by using the following commands:
set firewall family inet filter <filter-name> term <term-name> from source-address 10.10.100.0/24 set firewall family inet filter <filter-name> term <term-name> then routing-instance <instance-name> set interfaces <interface-name> unit <unit-number> family inet filter input <filter- name>
You must create a RIB group that adds interface routes to your routing instance. A RIB group is a mechanism that allows you to import routes from one routing table to another. You can use a RIB group to add the interface routes of the ingress interface to the routing table of the forwarding-type routing instance. This will ensure that the SRX device can forward the packets to the correct next hop based on the destination address. You can create a RIB group by using the following commands:
set routing-options rib-groups <rib-group-name> import-rib inet.0 set routing-options rib-groups <rib-group-name> import-rib <instance-name>.inet.0 set routing-instances <instance-name> routing- options instance-import <rib-group-name>
The following steps are not required or incorrect:
You do not need to create a VRF-type routing instance. A VRF-type routing instance is a type of routing instance that is used for virtual routing and forwarding. It allows you to create multiple logical routers on the same physical device, each with its own interfaces, routing protocols, and routing tables. VRF-type routing instances are typically used for VPNs, MPLS, or network segmentation. However, they are not necessary for FBF, which can be achieved with a forwarding- type routing instance.
You do not need to create and apply a firewall filter that matches on the destination address 10.10.100.0/24 and then sends this traffic to your routing instance. This would be redundant and unnecessary, as the destination address of the incoming traffic is already determined by the routing table of the forwarding-type routing instance. Moreover, this would create a loop, as the traffic would be sent back to the same routing instance that it came from.


Reference:

1: Filter-Based Forwarding Overview 2: Configuring Filter-Based Forwarding 3: forwarding (Routing Instances) 4: routing-instance (Firewall Filter Action) 5: Configuring RIB Groups : [vrf (Routing Instances)]



You are connecting two remote sites to your corporate headquarters site. You must ensure that all traffic is secured and sent directly between sites In this scenario, which VPN should be used?

  1. IPsec ADVPN
  2. hub-and-spoke IPsec VPN
  3. Layer 2 VPN
  4. full mesh Layer 3 VPN with EBGP

Answer(s): A

Explanation:

According to the Juniper documentation, the best VPN type for connecting two remote sites to the corporate headquarters site while ensuring that all traffic is secured and sent directly between sites is IPsec ADVPN. ADVPN stands for Auto Discovery VPN, which is a feature that allows the SRX Series devices to dynamically establish IPsec tunnels between remote sites without requiring a full mesh configuration. IPsec ADVPN uses NHRP (Next Hop Resolution Protocol) to discover the optimal path between two remote sites and create a shortcut tunnel that bypasses the hub device. This reduces the latency and bandwidth consumption of the traffic and improves the performance and scalability of the VPN.
To configure IPsec ADVPN on the SRX Series devices, the following steps are required:
Configure the hub device as an NHRP server and assign it a unique NHRP network ID and a public IP address.
Configure the spoke devices as NHRP clients and register them with the hub device using the same NHRP network ID and the hub's public IP address.
Configure the IPsec VPN parameters on the hub and spoke devices, such as the IKE and IPsec proposals, policies, and gateways.
Configure the routing protocols on the hub and spoke devices, such as OSPF or BGP, to advertise the routes between the sites.
Once the IPsec ADVPN is configured, the hub and spoke devices will establish IPsec tunnels with each other and exchange NHRP information.
When a spoke device needs to send traffic to another spoke device, it will send an NHRP resolution request to the hub device, which will reply with the public IP address of the destination spoke device. The source spoke device will then initiate a shortcut IPsec tunnel with the destination spoke device and send the traffic directly to it. The following VPN types are not suitable for this scenario:
Hub-and-spoke IPsec VPN: This type of VPN requires that all traffic between the remote sites go through the hub device, which adds latency and consumes bandwidth. It also does not scale well as the number of remote sites increases.
Layer 2 VPN: This type of VPN allows the remote sites to extend their Layer 2 networks over a Layer 3 network, such as the internet. It is typically used for data center interconnection or service provider networks. However, it does not provide any security or encryption for the traffic, and it may not be compatible with the existing network infrastructure.

Full mesh Layer 3 VPN with EBGP: This type of VPN allows the remote sites to exchange Layer 3 routing information over a Layer 3 network, such as the internet, using EBGP (External Border Gateway Protocol). It is typically used for enterprise networks or service provider networks. However, it requires that each remote site has a unique AS (Autonomous System) number and a public IP address, and that each remote site establishes a BGP session with every other remote site. This can be complex and cumbersome to configure and maintain, and it may not provide any security or encryption for the traffic.


Reference:

1: Auto Discovery VPN Overview 2: Understanding Auto Discovery VPN 3: Configuring NHRP on the Hub and Spoke Devices 4: Configuring IPsec VPN on the Hub and Spoke Devices :
[Configuring Routing Protocols on the Hub and Spoke Devices] : [Hub-and-Spoke VPNs Overview] :
[Layer 2 VPNs Feature Guide for Security Devices] : [Layer 3 VPNs Feature Guide for Security Devices]



You are asked to detect domain generation algorithms
Which two steps will accomplish this goal on an SRX Series firewall? (Choose two.)

  1. Define an advanced-anti-malware policy under [edit services].
  2. Attach the security-metadata-streaming policy to a security
  3. Define a security-metadata-streaming policy under [edit
  4. Attach the advanced-anti-malware policy to a security policy.

Answer(s): B,C

Explanation:

According to the Juniper documentation, the steps to detect domain generation algorithms (DGA) on an SRX Series firewall are as follows:
Define a security-metadata-streaming policy under [edit services]. A security-metadata-streaming policy is a configuration that enables the SRX Series firewall to collect and stream security metadata, such as DNS queries and responses, to Juniper ATP Cloud for analysis. Juniper ATP Cloud uses machine learning models and known pre-computed DGA domain names to provide domain verdicts, which helps in-line blocking and sinkholing of DNS queries on SRX Series firewalls. You can define a security-metadata-streaming policy by using the following command:
set services security-metadata-streaming policy <policy-name> Attach the security-metadata-streaming policy to a security zone. A security zone is a logical grouping of interfaces that have similar security requirements. You can attach the security-metadata- streaming policy to a security zone by using the following command:
set security zones security-zone <zone-name> services security-metadata-streaming policy <policy- name>
The following steps are not required or incorrect:
Define an advanced-anti-malware policy under [edit services]. An advanced-anti-malware policy is a configuration that enables the SRX Series firewall to scan files for malware using Juniper ATP Cloud. It is not related to DGA detection.
Attach the advanced-anti-malware policy to a security policy. A security policy is a configuration that defines the rules for permitting or denying traffic between security zones. It is not related to DGA detection.


Reference:

1: Configuring Security Metadata Streaming 2: Configuring Advanced Anti-Malware Policies 3: Configuring Security Policies



In Juniper ATP Cloud, what are two different actions available in a threat prevention policy to deal with an infected host? (Choose two.)

  1. Send a custom message
  2. Close the connection.
  3. Drop the connection silently.
  4. Quarantine the host.

Answer(s): B,D

Explanation:

In Juniper ATP Cloud, a threat prevention policy allows you to define how the system should handle an infected host. Two of the available actions are:
Close the connection: This action will close the connection between the infected host and the destination to which it is trying to connect. This will prevent the host from communicating with the destination and will stop any malicious activity.
Quarantine the host: This action will isolate the infected host from the network by placing it in a quarantine VLAN. This will prevent the host from communicating with other devices on the network, which will prevent it from spreading malware or exfiltrating data. Sending a custom message is used to notify the user and administrator of the action taken. Drop the connection silently is not an action available in Juniper ATP Cloud.

According to the Juniper documentation, the threat prevention policy in Juniper ATP Cloud is a configuration that defines the actions and notifications for different threat levels of the traffic. The threat levels are based on the verdicts returned by Juniper ATP Cloud after analyzing the files, URLs, and domains. The threat levels range from 1 to 10, where 1 is the lowest and 10 is the highest. The threat prevention policy allows the user to specify different actions for different threat levels. The actions can be applied to the traffic or to the infected host. The actions available for the traffic are:
Permit: Allows the traffic to pass through the SRX Series device without any interruption. Block: Blocks the traffic and sends a reset packet to the client and the server. Drop: Drops the traffic silently without sending any reset packet. Redirect: Redirects the traffic to a specified URL, such as a warning page or a sinkhole server.
The actions available for the infected host are:
None: Does not take any action on the infected host.
Quarantine: Quarantines the infected host by applying a firewall filter that blocks all outbound traffic from the host, except for the traffic to Juniper ATP Cloud or the specified redirect URL. Custom: Executes a custom script on the SRX Series device to perform a user-defined action on the infected host, such as sending an email notification or triggering an external system. Therefore, the two different actions available in a threat prevention policy to deal with an infected host are:
Block: This action will block the traffic from or to the infected host and send a reset packet to the client and the server. This will prevent the infected host from communicating with the malicious server or spreading the malware to other hosts.

Quarantine: This action will quarantine the infected host by blocking all outbound traffic from the host, except for the traffic to Juniper ATP Cloud or the redirect URL. This will isolate the infected host from the network and allow the user to remediate the infection.
The following actions are not available or incorrect:
Send a custom message: This is not an action available in the threat prevention policy. However, the user can use the custom action to execute a script that can send a custom message to the infected host or the administrator.
Drop the connection silently: This is an action available for the traffic, not for the infected host. It will drop the traffic without sending any reset packet, which may not be effective in stopping the infection or notifying the user.


Reference:

1: Configuring Threat Prevention Policies



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Juniper JN0-636: Skills Tested, Job Roles, and Study Tips

The JN0-636 Security, Professional certification is designed for networking professionals who possess advanced knowledge of the Juniper Networks Junos OS. This certification is intended for individuals who work in roles such as security engineers, network architects, or systems administrators responsible for managing complex security infrastructures. Employers in the telecommunications, enterprise networking, and managed services sectors prioritize this certification because it validates a candidate's ability to configure, troubleshoot, and maintain high-level security solutions within a Juniper environment. By achieving this credential, professionals demonstrate that they have the technical proficiency required to handle sophisticated security deployments, ensuring that network integrity and data protection are maintained at an enterprise scale.

The professional-level designation signifies that a candidate has moved beyond basic configuration tasks and is capable of managing intricate security policies and advanced network architectures. Organizations hiring for these roles look for individuals who can not only implement security measures but also diagnose and resolve complex issues that arise in production environments. This certification serves as a benchmark for technical competency, helping IT departments identify staff who are capable of securing critical infrastructure against evolving threats. Whether you are working in a data center or a distributed enterprise network, the skills validated by this Juniper certification are essential for maintaining the operational continuity and security posture of the organization.

What the JN0-636 Exam Covers

The JN0-636 exam evaluates a candidate's technical depth across several critical domains of security networking, requiring a comprehensive understanding of how these components interact within a Junos OS environment. Candidates must demonstrate proficiency in troubleshooting security policies and security zones, which involves identifying misconfigurations that could lead to traffic drops or security breaches. The exam also tests knowledge of logical systems and tenant systems, requiring an understanding of how to segment network resources effectively to support multi-tenancy. Furthermore, the curriculum covers Layer 2 security, advanced network address translation (NAT), and advanced IPsec VPNs, all of which are fundamental to securing modern network traffic. Our practice questions are structured to reflect these core domains, ensuring that you are tested on the practical application of these concepts rather than just theoretical definitions. By engaging with these topics, you will gain the necessary experience to handle advanced policy-based routing and multinode high availability (HA) configurations, which are vital for maintaining resilient and secure network operations.

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How to Prepare for the JN0-636 Exam

Effective exam preparation for the JN0-636 requires a balanced approach that combines hands-on experience with structured study habits. We strongly recommend that you utilize a real or virtualized Junos OS environment to practice the configurations discussed in the exam topics, as there is no substitute for seeing how security policies and NAT rules behave in a live setting. You should also rely heavily on official Juniper documentation, which provides the authoritative source of truth for command syntax, feature behavior, and best practices. Building a consistent study schedule is essential, allowing you to dedicate time to each topic area without rushing through the material. Every practice question includes a free AI Tutor explanation that breaks down the reasoning behind the correct answer — so you understand the concept, not just the answer, which is crucial for internalizing the logic required for the certification exam.

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On the day of your JN0-636 exam, you should be prepared for a professional testing environment, typically administered through a secure testing center or via an online proctoring service like Pearson VUE. The exam format generally consists of multiple-choice questions, which may include scenario-based problems that require you to analyze a network topology or a configuration snippet to determine the correct course of action. You will be given a set amount of time to complete the exam, and it is important to manage this time effectively by not spending too much time on any single question. The exam is designed to be rigorous, testing your depth of knowledge across the entire scope of the Security, Professional curriculum, so expect to encounter questions that require careful reading and logical deduction. Familiarize yourself with the testing interface and the rules provided by the testing vendor beforehand to minimize stress and ensure you can focus entirely on the technical content.

While the specific number of questions and the passing score can vary, the core experience of a Juniper certification exam is consistent: it is a test of your ability to apply Junos OS knowledge to real-world security challenges. You should arrive at the testing center or log into your online proctoring session with a clear understanding of the exam policies, including what materials are permitted and the procedures for flagging questions for review. Remember that the exam is a comprehensive assessment of your professional capabilities, and it is normal to encounter questions that challenge your understanding of specific features or troubleshooting methodologies. Stay calm, read each question thoroughly, and rely on the technical foundation you have built through your hands-on practice and study. By approaching the exam with a methodical mindset, you will be well-positioned to demonstrate your expertise and achieve your certification goals.

Who Should Use These JN0-636 Practice Questions

These practice questions are intended for security engineers, network administrators, and systems architects who are actively preparing for the JN0-636 certification exam. Ideally, candidates should have several years of experience working with Juniper security products and a solid understanding of the Junos OS, as this exam is aimed at professionals who are already comfortable with intermediate-level networking concepts. Whether you are looking to validate your skills for a promotion, transition into a more senior security role, or simply enhance your technical knowledge, this certification exam is a significant milestone in your career. By using our platform, you are engaging in a structured exam preparation process that is designed to help you identify your knowledge gaps and build the confidence needed to succeed in a professional certification environment.

To get the most out of these practice questions, do not simply read the answer and move on; engage deeply with the material by utilizing the AI Tutor explanation for every question you encounter. If you find yourself struggling with a particular topic, such as advanced IPsec VPNs or multinode HA, use the community discussions to see how others have approached similar problems and gain different perspectives on the configuration. We recommend flagging questions that you answer incorrectly and revisiting them after a few days to ensure that you have truly grasped the underlying concept. This iterative process of testing, reviewing, and refining your understanding is the most effective way to prepare for the rigors of the exam. Browse the questions above and use the community discussions and AI Tutor to build real exam confidence.

Updated on: 28 April, 2026

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