Important Juniper JN0-637 JNCIP-SEC Exam Questions

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Juniper Security, Professional JNCIP-SEC JN0-637 Exam

Attempt the Juniper Junos Security Certification practice test and solve real exam-like JNCIP-SEC JN0-637 questions to prepare efficiently and increase your chances of success. Our Juniper JN0-637 practice questions match the actual Security, Professional exam format, helping you enhance confidence and improve performance. With our JNCIP-SEC JN0-637 practice exam software, you can analyze your performance, identify weak areas, and work on them effectively to boost your final Juniper Junos Security Certification exam score.

Vendor:	Juniper
Exam Name:	Security, Professional
Registration Code:	JN0-637
Related Certification:	Juniper Junos Security Certification
Exam Audience:	Juniper networking professionals, Juniper ecurity specialists, IPsec VPNs,

Total Questions

115

Last Updated

25-08-2026

Exam Duration

90 MINUTES

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Question: 1

You are using ADVPN to deploy a hub-and-spoke VPN to connect your enterprise sites.

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

AADVPN creates a full-mesh topology.

BIBGP routing is required.

COSPF routing is required.

DCertificate-based authentication is required.

Answer: C, D

Question: 2

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

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

BIRB interfaces can be used to route traffic.

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

DIRB interfaces cannot be used to route traffic.

Answer: B, C

Question: 3

Exhibit:

Exam Question 3 Exhibit 1

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.)

AEnable next-hop tunnel binding.

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

CConfigure CoS forwarding classes and scheduling parameters.

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

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

Answer: B, C, E

Question: 4

A company has acquired a new branch office that has the same address space of one of its local networks, 192.168.100/24. The offices need to communicate with each other.

Which two NAT configurations will satisfy this requirement? (Choose two.)

A[edit security nat source]
user@OfficeA# show rule-set OfficeBtoA {
from zone OfficeB;
to zone OfficeA;
rule 1 {
match {
source-address 192.168.210.0/24;
destination-address 192.168.200.0/24;
}
then {
source-nat {
interface;
}
}
}
}

B[edit security nat static]
user@OfficeA# show rule-set From-Office-B {
from interface ge-0/0/0.0;
rule 1 {
match {
destination-address 192.168.200.0/24;
}
then {
static-nat {
prefix 192.168.100.0/24;
}
}
}
}

C[edit security nat static]
user@OfficeB# show rule-set From-Office-A {
from interface ge-0/0/0.0;
rule 1 {
match {
destination-address 192.168.210.0/24;
}
then {
static-nat {
prefix 192.168.100.0/24;
}
}
}
}

D[edit security nat source]
user@OfficeB# show rule-set OfficeAtoB {
from zone OfficeA;
to zone OfficeB;
rule 1 {
match {
source-address 192.168.200.0/24;
destination-address 192.168.210.0/24;
}
then {
source-nat {
interface;
}
}
}
}

Answer: A, D

Explanation:

The problem describes two offices needing to communicate, but both share the same IP address space, 192.168.100.0/24. To resolve this, NAT must be configured to translate the conflicting address spaces on each side. Here's how each of the configurations works:

Option A (Correct):

This source NAT rule translates the source address of traffic from Office B to Office A. By configuring source NAT, the source IP addresses from Office B (192.168.210.0/24) will be translated when communicating with Office A (192.168.200.0/24). This method ensures that there is no overlap in address space when packets are transmitted between the two offices.

Option D (Correct):

This is a source NAT rule configured on Office B, which translates the source addresses from Office A to prevent address conflicts. It ensures that when traffic is initiated from Office A to Office B, the overlapping address range (192.168.100.0/24) is translated.

Options B and C (Incorrect):

These options involve static NAT rules that map address ranges between the two offices, but they do not resolve the overlapping IP address space issue effectively. Static NAT is not the optimal solution in this scenario since the problem involves address space conflict, which requires translation of source addresses during communication.

Juniper Reference:

Juniper NAT Configuration Guide: Detailed instructions on how to configure source NAT and resolve address conflicts between networks.

Question: 5

You configure two Ethernet interfaces on your SRX Series device as Layer 2 interfaces and add them to the same VLAN. The SRX is using the default L2-learning setting. You do not add the interfaces to a security zone.

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

AYou are unable to apply stateful security features to traffic that is switched between the two interfaces.

BYou are able to apply stateful security features to traffic that enters and exits the VLAN.

CThe interfaces will not forward traffic by default.

DYou cannot add Layer 2 interfaces to a security zone.

Answer: A, C

Explanation:

When Ethernet interfaces are configured as Layer 2 and added to the same VLAN without being assigned to a security zone, they will not forward traffic by default. Additionally, because they are operating in a pure Layer 2 switching mode, they lack the capability to enforce stateful security policies. For further details, refer to Juniper Ethernet Switching Layer 2 Documentation.

Explanation of Answer A (Unable to Apply Stateful Security Features):

When two interfaces are configured as Layer 2 interfaces and belong to the same VLAN but are not assigned to any security zone, traffic switched between them is handled purely at Layer 2. Stateful security features, such as firewall policies, are applied at Layer 3, so traffic between these interfaces will not undergo any stateful inspection or firewalling by default.

Explanation of Answer C (Interfaces Will Not Forward Traffic):

In Junos, Layer 2 interfaces must be added to a security zone to allow traffic forwarding. Since the interfaces in this scenario are not part of a security zone, they will not forward traffic by default until assigned to a zone. This is a security measure to prevent unintended forwarding of traffic.

Juniper Security Reference:

Layer 2 Interface Configuration: Layer 2 interfaces must be properly assigned to security zones to enable traffic forwarding and apply security policies. Reference: Juniper Networks Layer 2 Interface Documentation.

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