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Juniper JN0-637 시험요강:

주제
소개

주제 1

• Troubleshooting Security Policies and Security Zones: This topic assesses the skills of networking professionals in troubleshooting and monitoring security policies and zones using tools like logging and tracing.

주제 2

• Logical Systems and Tenant Systems: This topic of the exam explores the concepts and functionalities of logical systems and tenant systems.

주제 3

• Advanced IPsec VPNs: Focusing on networking professionals, this part covers advanced IPsec VPN concepts and requires candidates to demonstrate their skills in real-world applications.

주제 4

• Automated Threat Mitigation: This topic covers Automated Threat Mitigation concepts and emphasizes implementing and managing threat mitigation strategies.

최신 JNCIP-SEC JN0-637 무료샘플문제 (Q106-Q111):

질문 # 106
Exhibit

Referring to the exhibit, which two statements are true about the CAK status for the CAK named
"FFFP"? (Choose two.)

• A. CAK is not used for encryption and decryption of the MACsec session.
• B. CAK is used for encryption and decryption of the MACsec session.
• C. SAK is successfully generated using this key.
• D. SAK is not generated using this key.

정답：B,D

질문 # 107
Your IPsec tunnel is configured with multiple security associations (SAs). Your SRX Series device supports the CoS-based IPsec VPNs with multiple IPsec SAs feature. You are asked to configure CoS for this tunnel.
Which two statements are true in this scenario? (Choose two.)

• A. The local and remote gateways must have the forwarding classes defined in the same order.
• B. The local and remote gateways do not need the forwarding classes to be defined in the same order.
• C. A maximum of eight forwarding classes can be configured for a VPN with the multi-sa forwarding- classes statement.
• D. A maximum of four forwarding classes can be configured for a VPN with the multi-sa forwarding- classes statement.

정답：B,C

질문 # 108
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.)

• A. You are able to apply stateful security features to traffic that enters and exits the VLAN.
• B. You are unable to apply stateful security features to traffic that is switched between the two interfaces.
• C. You cannot add Layer 2 interfaces to a security zone.
• D. The interfaces will not forward traffic by default.

정답：B,D

설명：
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 asecurity zoneto 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.

질문 # 109
You are enabling advanced policy-based routing. You have configured a static route that has a next hop from the inet.0 routing table. Unfortunately, this static route is not active in your routing instance.
In this scenario, which solution is needed to use this next hop?

• A. Use filter-based forwarding.
• B. Use transparent mode.
• C. Use RIB groups.
• D. Use policies.

정답：C

설명：
To enable advanced policy-based routing in Junos OS and activate a static route with a next-hop address in the inet.0 table within your routing instance, you should utilize RIB groups. RIB groups allow you to import routes from one routing table to another. In this scenario, the static route within the routing instance needs access to the inet.0 routes, which is facilitated by configuring a RIB group. Juniper's documentation outlines RIB groups as a necessary component for handling instances where routes need to be shared across routing tables, thereby ensuring seamless traffic flow through specified routes. For more details, refer to the Juniper Networks Documentation on RIB Groups.
In Junos OS for SRX Series devices, when enabling advanced policy-based routing and configuring a static route with a next-hop from the inet.0 routing table, the issue arises because the static route is not being used in the routing instance. This is a common scenario when the next-hop belongs to a different routing table or instance, and the routing instance is not aware of that next-hop.
To resolve this, RIB (Routing Information Base) groups are used. RIB groups allow routes from one routing table (RIB) to be shared or imported into another routing table. This means that the routing instance can import the necessary routes from inet.0 and make them available for the routing instance where the policy- based routing is applied.
Detailed Steps:
* Configure the Static Route: First, configure the static route pointing to the next-hop in inet.0. Here's an example:
bash
set routing-options static route 10.1.1.0/24 next-hop 192.168.1.1
This static route will be placed in the inet.0 routing table by default.
* Create and Apply a RIB Group: To import routes from inet.0 into the routing instance, create a RIB group configuration. This will allow the static route from inet.0 to be visible within the routing instance.
Example configuration for the RIB group:
bash
set routing-options rib-groups RIB-GROUP import-rib inet.0
set routing-options rib-groups RIB-GROUP import-rib <routing-instance-name>.inet.0 This configuration ensures that routes from inet.0 are imported into the specified routing instance.
* Apply the RIB Group to the Routing Instance: Once the RIB group is configured, apply it to the appropriate routing instance:
bash
set routing-instances <routing-instance-name> routing-options rib-group RIB-GROUP
* Verify Configuration: Use the following command to verify that the static route has been imported into the routing instance:
bash
show route table <routing-instance-name>.inet.0
The output should now display the static route imported from inet.0.
Juniper Security Reference:
* RIB Groups Overview: Juniper's documentation provides detailed information on how RIB groups function and how to use them to share routes between different routing tables. This is essential for scenarios involving policy-based routing where routes from one instance (like inet.0) need to be available in another instance. Reference: Juniper Networks Documentation on RIB Groups.
By using RIB groups, you ensure that the static route from inet.0 is available in the appropriate routing instance for policy-based routing to function correctly. This avoids the need for other methods like filter- based forwarding or transparent mode, which do not address the specific issue of static route visibility across routing instances.

질문 # 110
Which two statements are true about the procedures the Junos security device uses when handling traffic destined for the device itself? (Choose two.)

• A. If the received packet is addressed to the ingress interface, then the device first performs a security policy evaluation for the junos-host zone.
• B. If the received packet is addressed to the ingress interface, then the device first examines the host- inbound-traffic configuration for the ingress interface and zone.
• C. If the received packet is destined for an interface other than the ingress interface, then the device performs a security policy evaluation based on the ingress and egress zone.
• D. If the received packet is destined for an interface other than the ingress interface, then the device performs a security policy evaluation for the junos-host zone.

정답：B,D

설명：
When handling traffic that is destined for itself, the SRX examines the host-inbound-traffic configuration for the ingress interface and the associated security zone. It evaluates whether the traffic should be allowed based on this configuration. Traffic not addressed to the ingress interface is handled based on security policies within the junos-host zone, which applies to traffic directed to the SRX itself. For more details, refer to Juniper Host Inbound Traffic Documentation.
When handling traffic that is destined for the SRX device itself (also known as host-bound traffic), the SRX follows a specific process to evaluate the traffic and apply the appropriate security policies. The junos-host zone is a special security zone used for managing traffic destined for the device itself, such as management traffic (SSH, SNMP, etc.).
* Explanation of Answer B (Packet to a Different Interface):
* If the packet is destined for an interface other than the ingress interface, the SRX performs a security policy evaluation specifically for the junos-host zone. This ensures that management or host-bound traffic is evaluated according to the security policies defined for that zone.
* Explanation of Answer C (Packet to the Ingress Interface):
* If the packet is addressed to the ingress interface, the device first checks the host-inbound- traffic configuration for the ingress interface and zone. This configuration determines whether certain types of traffic (such as SSH, HTTP, etc.) are allowed to reach the device on that specific interface.
Step-by-Step Handling of Host-Bound Traffic:
* Host-Inbound Traffic: Define which services are allowed to the SRX device itself:
bash
set security zones security-zone <zone-name> host-inbound-traffic system-services ssh
* Security Policy for junos-host: Ensure policies are defined for managing traffic destined for the SRX device:
bash
set security policies from-zone <zone-name> to-zone junos-host policy allow-ssh match source-address any set security policies from-zone <zone-name> to-zone junos-host policy allow-ssh match destination-address any Juniper Security Reference:
* Junos-Host Zone: This special zone handles traffic destined for the SRX device, including management traffic. Security policies must be configured to allow this traffic. Reference: Juniper Networks Host-Inbound Traffic Documentation.

질문 # 111
......

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