Expert Answers to Juniper Exam JN0-637 Questions

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JNCIP-SEC Security, Professional (JNCIP-SEC)

Security, Professional (JNCIP-SEC)

Last Update Feb 15, 2026
Total Questions : 115

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Questions 2

You have a multinode HA default mode deployment and the ICL is down.

In this scenario, what are two ways that the SRX Series devices verify the activeness of their peers? (Choose two.)

Options:

Custom IP addresses may be configured for the activeness probe.

Fabric link heartbeats are used to verify the activeness of the peers.

Each peer sends a probe with the virtual IP address as the destination IP address.

Each peer sends a probe with the virtual IP address as the source IP address and the upstream router as the destination IP address.

Discussion 0

Answer:

A, D

Explanation:

Comprehensive Detailed Step-by-Step Explanation with All Juniper Security References

Understanding the Scenario:

Multinode HA Default Mode Deployment:

In a chassis cluster, two SRX devices operate together to provide high availability.

ICL (Inter-Cluster Link) is Down:

The control and fabric links between the nodes are not operational.

Objective:

Determine how the SRX devices verify each other's activeness without the ICL.

Option A: Custom IP addresses may be configured for the activeness probe.

Explanation:

When the control link is down, SRX devices use an ICMP ping-based activeness probe to check the peer's status.

Custom IP addresses can be configured as probe targets to verify the peer's activeness.

[Reference:, "You can configure the SRX Series device to send activeness probes to a configured IP address to verify the peer's state when the control link is down.", Source: Juniper Networks Documentation - Control Link Failure Detection, Option D: Each peer sends a probe with the virtual IP address as the source IP address and the upstream router as the destination IP address., Explanation:, The SRX devices send ICMP probes to an upstream device using the redundancy group's virtual IP address as the source., This helps determine if the peer node is still active by verifying network reachability., Reference:, "When the control link fails, each node sends ICMP pings to the configured probe addresses using the redundancy group's virtual IP address as the source.", Source: Juniper Networks Documentation - Chassis Cluster Control Link Failure, Why Options B and C are Incorrect:, Option B: Fabric link heartbeats cannot be used because the ICL (which includes the fabric link) is down., Option C: Probes are sent to upstream devices, not using the virtual IP address as the destination., Conclusion:, The correct options are A and D because they accurately describe how SRX devices verify activeness without the ICL., ]

Questions 3

Exhibit:

Questions 3

You are having problems configuring advanced policy-based routing.

What should you do to solve the problem?

Options:

Apply a policy to the APBR RIB group to only allow the exact routes you need.

Change the routing instance to a forwarding instance.

Change the routing instance to a virtual router instance.

Remove the default static route from the main instance configuration.

Discussion 0

Questions 4

You have deployed automated threat mitigation using Security Director with Policy Enforcer, Juniper ATP Cloud, SRX Series devices, and EX Series switches.

In this scenario, which device is responsible for blocking the infected hosts?

Options:

Policy Enforcer

Security Director

Juniper ATP Cloud

EX Series switch

Discussion 0

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Questions 5

You need to generate a certificate for a PKI-based site-to-site VPN. The peer is expecting to

user your domain name vpn.juniper.net.

Which two configuration elements are required when you generate your certificate request? (Chose two,)

Options:

ip-address 10.100.0.5

subject CN=vpn.juniper.net

email admin@juniper.net