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JNCIP-SEC
JN0-637
Security, Professional (JNCIP-SEC) Questions and Answers

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Questions # 1:

You need to set up source NAT so that external hosts can initiate connections to an internal device, but only if a connection to the device was first initiated by the internal device.

Which type of NAT solution provides this functionality?

Options:

Address persistence

Persistent NAT with any remote host

Persistent NAT with target host

Static NAT

Answer

Explanation

Persistent NAT with target host allows external hosts to establish connections only when the internal device initiates a session first, ideal for specific interactive applications. Refer to Juniper Persistent NAT Documentation.

The scenario requires that external hosts be able to initiate a connection only if the internal device has already initiated a connection. The correct solution is Persistent NAT with target host, which ensures that a specific external host can initiate new connections back to the internal device, but only after the internal device has established a session first.

Persistent NAT with Target Host (Answer C): This allows the internal device to initiate a connection, and once established, the specified external host can also initiate new connections to the internal device on the same NAT mapping.

Example Configuration:

bash

set security nat source persistent-nat permit target-host-port

This solution is appropriate when controlled bidirectional communication is required based on an internal-initiated connection.

[: Juniper persistent NAT documentation., , ==========, ]

Questions # 2:

The exhibit shows part of the flow session logs.

Question # 2

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

Options:

The existing session is found in the table, and the fast path process begins.

This packet arrives on interface ge-0/0/4.0.

Junos captures a TCP packet from source address 172.20.101.10 destined to 10.0.1.129.

Destination NAT occurs.

Answer

B, D

Questions # 3:

Which two statements are correct about mixed mode? (Choose two.)

Options:

Layer 2 and Layer 3 interfaces can use the same security zone.

IRB interfaces can be used to route traffic.

Layer 2 and Layer 3 interfaces can use separate security zones.

IRB interfaces cannot be used to route traffic.

Answer

B, C

Questions # 4:

Which two statements are correct about automated threat mitigation with Security Director? (Choose two.)

Options:

It works with third-party switches.

It provides endpoint protection by running a Juniper ATP Cloud agent on the servers.

It provides endpoint protection by running a Juniper ATP Cloud agent on EX Series devices.

It works with SRX Series devices.

Answer

A, D

Questions # 5:

Exhibit:

Question # 5

Your company uses SRX Series devices to establish an IPsec VPN that connects Site-1 and the HQ networks. You want VoIP traffic to receive priority over data traffic when it is forwarded across the VPN.

Which three actions should you perform in this scenario? (Choose three.)

Options:

Enable next-hop tunnel binding.

Create a firewall filter that identifies VoIP traffic and associates it with the correct forwarding class.

Configure CoS forwarding classes and scheduling parameters.

Enable the copy-outer-dscp parameter so that DSCP header values are copied to the tunneled packets.

Enable the multi-sa parameter to enable two separate IPsec SAs for the VoIP and data traffic.

Answer

B, C, E

Explanation

==========

Questions # 6:

You are configuring advanced policy-based routing. You have created a static route with next

hop of an interface in your inet.0 routing table

Question # 6

Referring to the exhibit, what should be changed to solve this issue?

Options:

You should change the routing instance type to virtual-router.

You should move the static route configuration to the main routing instance.

You should move the inet. o table before the routing instance table in your rib-groups configuration.

You should delete the interface-routes configuration under the routing-options hierarchy.

Answer

Questions # 7:

Exhibit:

Question # 7

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

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

Options:

You must delete one forwarding class.

You must change the loss priorities of the forwarding classes to low.

You must use inet precedence instead of DSCP.

You must change the code point for the DB-data forwarding class to 10000.

Answer

Explanation

In the exhibit, the CoS-based VPN configuration is not functioning correctly due to an issue with the number of forwarding classes. The maximum number of forwarding classes supported for CoS-based VPNs with multiple SAs (security associations) is typically four forwarding classes. In this case, more than four forwarding classes are defined.

To solve the issue, one forwarding class must be deleted to ensure that the total number of forwarding classes is reduced to four or fewer.

[: Juniper CoS-based VPNs and forwarding class limitations., ==========, ]

Questions # 8:

Referring to the exhibit,

Question # 8

which three statements about the multinode HA environment are true? (Choose three.)

Options:

Two services redundancy groups are available.

IP monitoring has failed for the services redundancy group.

Node 1 will host services redundancy group 1 unless it is unavailable.

Session state is synchronized on both nodes.

Node 2 will process transit traffic that it receives for services redundancy group 1.

Answer

A, C, D

Explanation

Referring to the exhibit for a multinode HA environment, we can conclude the following about the HA setup:

Two Services Redundancy Groups (Correct: Option A):The output shows the status of SRG 0 and SRG 1, confirming that there are two services redundancy groups in the HA configuration.

Node 1 Hosting SRG 1 (Correct: Option C):The exhibit indicates that Node 1 is currently active for SRG 1. According to the configuration, Node 1 will continue to host SRG 1 unless it becomes unavailable.

Session State Synchronization (Correct: Option D):In this HA setup, session state synchronization is enabled between the two nodes. This ensures that sessions remain active and seamless failover can occur if one node fails.

Juniper References:

Juniper HA Documentation: Provides details on multinode HA setups, SRG configurations, and session synchronization.

==========

Questions # 9:

You are attempting to ping the IP address that is assigned to the loopback interface on the

SRX series device shown in the exhibit.

Question # 9