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Juniper JN0-637 Exam Questions
Security, Professional (Page 12 )

Updated On: 24-Feb-2026
Page 4 of 24
PDF with 115 Questions

Exhibit:



You have deployed an SRX Series device as shown in the exhibit. The devices in the Local zone have recently been added, but their SRX interfaces have not been configured. You must configure the SRX to meet the following requirements:
Devices in the 10.1.1.0/24 network can communicate with other devices in the same network but not with other networks or the SRX.
You must be able to apply security policies to traffic flows between devices in the Local zone.
Which three configuration elements will be required as part of your configuration? (Choose three.)

  1. set security zones security-zone Local interfaces ge-0/0/1.0
  2. set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-members 10
  3. set protocols l2-learning global-mode switching
  4. set protocols l2-learning global-mode transparent-bridge
  5. set security zones security-zone Local interfaces irb.10

Answer(s): A,B,D

Explanation:

In this scenario, we need to configure the SRX Series device so that devices in the Local zone (VLAN 10, 10.1.1.0/24 network) can communicate with each other but not with other networks or the SRX itself. Additionally, you must be able to apply security policies to traffic flows between the devices in the Local zone.
Explanation of Answer A (Assigning Interface to Security Zone):
You need to assign the interface ge-0/0/1.0 to the Local security zone. This is crucial because the SRX only applies security policies to interfaces assigned to security zones. Without this, traffic between devices in the Local zone won't be processed by security policies.
Configuration:

set security zones security-zone Local interfaces ge-0/0/1.0 Explanation of Answer B (Configuring Ethernet-Switching for VLAN 10):
Since we are using Layer 2 switching between devices in VLAN 10, we need to configure the interface to operate in Ethernet switching mode and assign it to VLAN 10.
Configuration:

set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-members 10 Explanation of Answer D (Transparent Bridging Mode for Layer 2):
The global mode for Layer 2 switching on the SRX device must be set to transparent-bridge. This ensures that the SRX operates in Layer 2 mode and can switch traffic between devices without routing.
Configuration:

set protocols l2-learning global-mode transparent-bridge Summary:
Interface Assignment: Interface ge-0/0/1.0 is assigned to the Local zone to allow policy enforcement. Ethernet-Switching: The interface is configured for Layer 2 Ethernet switching in VLAN 10. Transparent Bridging: The SRX is configured in Layer 2 transparent-bridge mode for switching between devices.
Juniper Security


Reference:

Layer 2 Bridging and Switching Overview: This mode allows the SRX to act as a Layer 2 switch for forwarding traffic between VLAN members without routing.

Juniper Transparent Bridging Documentation.



Exhibit:





Referring to the exhibit, which statement is true?

  1. SRG1 is configured in hybrid mode.
  2. The ICL is encrypted.
  3. If SRG1 moves to peer 2, peer 1 will drop packets sent to the SRG1 interfaces.
  4. If SRG1 moves to peer 2, peer 1 will forward packets sent to the SRG1 interfaces.

Answer(s): D

Explanation:

The exhibit describes a Chassis Cluster configuration with high availability (HA) settings. The key information is related to Service Redundancy Group 1 (SRG1) and its failover behavior between the two peers.
Explanation of Answer D (Packet Forwarding after Failover):
In a typical SRX HA setup with active/backup configuration, if the SRG1 group moves to peer 2 (the backup), peer 1 (previously the active node) will forward packets to peer 2 instead of dropping them. This ensures smooth failover and seamless continuation of services without packet loss. This behavior is part of the active/backup failover process in SRX chassis clusters, where the standby peer takes over traffic processing without disruption.
Juniper Security


Reference:

Chassis Cluster Failover Behavior: When a service redundancy group fails over to the backup peer, the previously active peer forwards traffic to the new active node.

Juniper Chassis Cluster Documentation.



You are asked to create multiple virtual routers using a single SRX Series device. You must ensure that each virtual router maintains a unique copy of the routing protocol daemon (RPD) process.
Which solution will accomplish this task?

  1. Secure wire
  2. Tenant system
  3. Transparent mode
  4. Logical system

Answer(s): D

Explanation:

Logical systems on SRX Series devices allow the creation of separate virtual routers, each with its unique RPD process. This segmentation ensures that routing and security policies are isolated across different logical systems, effectively acting like independent routers within a single SRX device. For further information, see Juniper Logical Systems Documentation.

To create multiple virtual routers on a single SRX Series device, each with its own unique copy of the routing protocol daemon (RPD) process, you need to use logical systems. Logical systems allow for the segmentation of an SRX device into multiple virtual routers, each with independent configurations, including routing instances, policies, and protocol daemons.

Explanation of Answer D (Logical System):
A logical system on an SRX device enables you to create multiple virtual instances of the SRX, each operating independently with its own control plane and routing processes. Each logical system gets a separate copy of the RPD process, ensuring complete isolation between virtual routers. This is the correct solution when you need separate routing instances with their own RPD processes on the same physical device.
Configuration Example:
bash set logical-systems <logical-system-name> interfaces ge-0/0/0 unit 0 set logical-systems <logical-system-name> routing-options static route 0.0.0.0/0 next-hop 192.168.1.1

Juniper Security


Reference:

Logical Systems Overview: Logical systems allow for the creation of multiple virtual instances within a single SRX device, each with its own configuration and control plane.

Juniper Logical Systems Documentation.



Click the Exhibit button.



Referring to the exhibit, which three actions do you need to take to isolate the hosts at the switch port level if they become infected with malware? (Choose three.)

  1. Enroll the SRX Series device with Juniper ATP Cloud.
  2. Use a third-party connector.
  3. Deploy Security Director with Policy Enforcer.
  4. Configure AppTrack on the SRX Series device.
  5. Deploy Juniper Secure Analytics.

Answer(s): A,B,C

Explanation:

A. Enroll the SRX Series device with Juniper ATP Cloud. This is essential for the SRX to receive threat intelligence from ATP Cloud, enabling it to identify infected hosts and take action. B. Use a third-party connector. In this specific scenario, a third-party connector is required to integrate the SRX with the third-party switch.
While Juniper has native integration for its EX switches, a connector is necessary to communicate with and manage the third-party switch. C. Deploy Security Director with Policy Enforcer. Security Director orchestrates the automated response, and Policy Enforcer translates the policies into device-specific commands for the SRX and the third-party switch (via the connector).



You want to deploy two vSRX instances in different public cloud providers to provide redundant security services for your network. Layer 2 connectivity between the two vSRX instances is not possible.
What would you configure on the vSRX instances to accomplish this task?

  1. Chassis cluster
  2. Secure wire
  3. Multinode HA
  4. Virtual chassis

Answer(s): C






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