Master Juniper JN0-637 Exam with Reliable Practice Questions

Correct : A, C

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

Understanding the Session Output:

Session State: Valid

Indicates that the session is active and permitted by security policies.

Policy Name: L1-to-L9/11

Shows the policy that allowed the session.

In Direction:

Source: 10.10.101.10

Destination: 10.10.102.10

Packets: 1

Bytes: 84

Out Direction:

Packets: 0

Bytes: 0

Indicates no return traffic.

Option A: The traffic is permitted.

The session state is Valid, and a policy name is specified.

This means the SRX device allowed the traffic.

'A session with a Valid state and an associated policy name indicates permitted traffic.'

Source: Juniper TechLibrary - Understanding Security Flow Sessions

Option C: The destination device is not responding.

The lack of packets in the Out direction suggests that the destination (10.10.102.10) is not responding.

'If there are no packets in the reverse direction, it may indicate that the destination host is not responding.'

Source: Juniper KB - Troubleshooting Traffic Flows

Why Options B and D are Incorrect:

Option B: The traffic was initiated by 10.10.101.10, not 10.10.102.10.

Option D: The session is valid and permitted; the traffic is not denied.

Conclusion:

The correct options are A and C because they accurately describe the state of the session.

Correct : A, C

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

Understanding Multinode HA:

Chassis Cluster in Active/Passive Mode:

One node is active, and the other is standby.

Dynamic Routing Protocols:

Run on the active node only.

Option A: Dynamic routing is active on one device at a time.

In active/passive HA, dynamic routing protocols run only on the primary (active) node.

'In a chassis cluster, the primary node handles all control plane tasks, including dynamic routing.'

Source: Juniper TechLibrary - Chassis Cluster Overview

Option C: Physical connections are used for the control and fabric links.

Control and fabric links are direct physical connections between cluster nodes.

'The control and fabric links must be connected using physical interfaces between the nodes.'

Source: Juniper TechLibrary - Chassis Cluster Components

Why Options B and D are Incorrect:

Option B: Dynamic routing is not active on both devices simultaneously in active/passive mode.

Option D: The Inter-Cluster Link (ICL) uses Layer 2 connectivity, not Layer 3.

Conclusion:

The correct options are A and C.

Correct : B

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

Understanding Secure Wire:

Secure Wire Feature:

Connects two interfaces directly without any Layer 2 or Layer 3 processing.

No routing or switching lookup occurs.

Use Case:

Ideal for scenarios where traffic needs to pass through the SRX device transparently.

Option B: Secure wire

Secure wire creates a bidirectional link between two interfaces.

Traffic flows between the interfaces as if they are connected by a physical wire.

'The secure wire feature allows traffic to pass between two interfaces without any security processing or route lookups.'

Source: Juniper TechLibrary - Secure Wire Overview

Why Other Options Are Incorrect:

Option A: Transparent mode involves Layer 2 switching.

Option C: Mixed mode combines Layer 2 and Layer 3 but doesn't prevent switching/routing lookups.

Option D: Switching mode operates at Layer 2 and includes switching lookups.

Conclusion:

Secure wire is the correct feature to map two interfaces together without switching or routing lookups.

Correct : B, D

Correct : D