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Question #1

You are using trace options to troubleshoot a security policy on your SRX Series device.

Referring to the exhibit, which two statements are true? (Choose two.)

A . The SSH traffic matches an existing session.
B . No entries are created in the SRX session table.
C . The traffic is not destined for the root logical system.
D . The security policy controls traffic destined to the SRX device.

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Question #2

Click the Exhibit button.

Referring to the exhibit, which two statements are true? (Choose two.)

A . The traffic is permitted.
B . The traffic was initiated by the 10.10.102.10 address.
C . The destination device is not responding.
D . The traffic is denied.

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Question #3

Exhibit:

You have configured a CoS-based VPN that is not functioning correctly.

Referring to the exhibit, which action will solve the problem?

A . You must delete one forwarding class.
B . You must change the loss priorities of the forwarding classes to low.
C . You must use inet precedence instead of DSCP.
D . You must change the code point for the DB-data forwarding class to 10000.

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Question #4

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.)

A . set security zones security-zone Local interfaces ge-0/0/1.0
B . set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-members 10
C . set protocols l2-learning global-mode switching
D . set protocols l2-learning global-mode transparent-bridge
E . set security zones security-zone Local interfaces irb.10

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Question #5

Which two statements about the differences between chassis cluster and multinode HA on SRX series devices are true? (Choose Two)

A . Multinode HA member nodes require Layer 2 connectivity.
B . Multinode HA supports Layer 2 and Layer 3 connectivity between nodes.
C . Multinode HA requires Layer 3 connectivity between nodes.
D . Chassis cluster member nodes require Layer 2 connectivity.

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Question #6

You are setting up multinode HA for redundancy.

Which two statements are correct in this scenario? (Choose two.)

A . Dynamic routing is active on one device at a time.
B . Dynamic routing is active on both devices.
C . Physical connections are used for the control and fabric links.
D . ICL links require Layer 3 connectivity between peers.

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Question #6

You are setting up multinode HA for redundancy.

Which two statements are correct in this scenario? (Choose two.)

A . Dynamic routing is active on one device at a time.
B . Dynamic routing is active on both devices.
C . Physical connections are used for the control and fabric links.
D . ICL links require Layer 3 connectivity between peers.

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Question #8

You want to use a security profile to limit the system resources allocated to user logical systems.

In this scenario, which two statements are true? (Choose two.)

A . If nothing is specified for a resource, a default reserved resource is set for a specific logical system.
B . If you do not specify anything for a resource, no resource is reserved for a specific logical system, but the entire system can compete for resources up to the maximum available.
C . One security profile can only be applied to one logical system.
D . One security profile can be applied to multiple logical systems.

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Question #9

You are deploying OSPF over IPsec with an SRX Series device and third-party device using GRE.

Which two statements are correct? (Choose two.)

A . The GRE interface should use lo0 as endpoints.
B . The OSPF protocol must be enabled under the VPN zone.
C . Overlapping addresses are allowed between remote networks.
D . The GRE interface must be configured under the OSPF protocol.

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Richtige Antwort: A, D
A, D

Explanation:

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

Understanding the Scenario:

Objective: Deploy OSPF over IPsec between an SRX Series device and a third-party device using GRE tunnels.

Components Involved:

GRE (Generic Routing Encapsulation): Encapsulates packets to allow routing protocols like OSPF to run over IPsec tunnels.

IPsec: Provides security for the GRE tunnels.

OSPF: Dynamic routing protocol used over the GRE tunnel.

Option A: The GRE interface should use lo0 as endpoints.

Using the loopback interface (lo0) as the source and destination endpoints for GRE tunnels is a

common best practice.

Advantages:

Stability: Loopback interfaces are always up, ensuring the GRE tunnel remains operational even if physical interfaces fail.

Reachability: Provides consistent endpoint IP addresses for GRE tunnels.

Configuration:

Assign IP addresses to lo0 interfaces on both devices.

Configure GRE tunnels to use these lo0 IP addresses as source and destination.

Reference: Juniper Networks Documentation:

"Using loopback interfaces as GRE tunnel endpoints ensures stability and consistent reachability for

routing protocols over GRE tunnels."

Source: Configuring GRE Tunnels

Option D: The GRE interface must be configured under the OSPF protocol.

To run OSPF over the GRE tunnel, the GRE interface must be included in the OSPF configuration.

Configuration Steps:

Create GRE Interface:

Example: set interfaces gr-0/0/0 unit 0 tunnel source <source-ip> tunnel destination <destination-ip>

Assign IP Address to GRE Interface:

Example: set interfaces gr-0/0/0 unit 0 family inet address <ip-address>

Include GRE Interface in OSPF:

Example: set protocols ospf area <area-id> interface gr-0/0/0.0

Result:

OSPF will establish adjacencies over the GRE interface and exchange routing information.

Reference: Juniper Networks Documentation:

"To enable OSPF over GRE tunnels, you must include the GRE interfaces in the OSPF configuration."

Source: OSPF over GRE Configuration

Why Options B and C are Incorrect:

Option B: The OSPF protocol must be enabled under the VPN zone.

Since OSPF is running over the GRE tunnel, which is encapsulated over IPsec, the OSPF packets are encapsulated within GRE and IPsec.

The SRX device does not need to allow OSPF in the security policies or enable OSPF under the VPN

zone for GRE-encapsulated traffic.

Security Policies:

The GRE traffic (IP protocol 47) must be permitted through the security policies.

OSPF runs inside the GRE tunnel and does not require additional configuration under the VPN zone.

Reference: Juniper Networks Documentation:

"When using GRE over IPsec, routing protocols run over GRE and do not require separate security policies for their control traffic."

Source: Security Policies for GRE over IPsec

Option C: Overlapping addresses are allowed between remote networks.

Overlapping IP addresses can cause routing conflicts and are generally not recommended.

In a GRE over IPsec scenario, overlapping addresses can lead to issues in routing protocol adjacency

and data forwarding.

Best Practice:

Ensure unique IP addressing schemes between remote networks to prevent routing issues.

Reference: Juniper Networks Documentation:

"Overlapping IP address spaces can lead to routing ambiguities and should be avoided when configuring GRE tunnels."

Source: Avoiding Overlapping IP Addresses

Conclusion:

Correct Answers: A and D

Rationale:

Option A is correct because using lo0 as endpoints for GRE provides stability and reliability.

Option D is correct because the GRE interface must be included in the OSPF configuration to enable OSPF over the tunnel.

Question #10

In a multinode HA environment, which service must be configured to synchronize between nodes?

A . Advanced policy-based routing
B . PKI certificates
C . IPsec VPN
D . IDP

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