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[General] Test JN0-637 Passing Score & JN0-637 Frenquent Update

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【General】 Test JN0-637 Passing Score & JN0-637 Frenquent Update

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Juniper JN0-637 Exam Syllabus Topics:
TopicDetails
Topic 1
  • Layer 2 Security: It covers Layer 2 Security concepts and requires candidates to configure or monitor related scenarios.
Topic 2
  • Advanced Network Address Translation (NAT): This section evaluates networking professionals' expertise in advanced NAT functionalities and their ability to manage complex NAT scenarios.
Topic 3
  • 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.
Topic 4
  • 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.
Topic 5
  • Automated Threat Mitigation: This topic covers Automated Threat Mitigation concepts and emphasizes implementing and managing threat mitigation strategies.

Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q75-Q80):NEW QUESTION # 75
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@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;
    }
    }
    }
    }
  • 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 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;
    }
    }
    }
    }
  • D. [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;
    }
    }
    }
    }
Answer: A,C
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 fromOffice Bto 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 onOffice B, which translates the source addresses fromOffice Ato prevent address conflicts. It ensures that when traffic is initiated fromOffice AtoOffice 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 References:
* Juniper NAT Configuration Guide: Detailed instructions on how to configure source NAT and resolve address conflicts between networks.

NEW QUESTION # 76
Your customer needs embedded security in an EVPN-VXLAN solution.
What are two benefits of adding an SRX Series device in this scenario? (Choose two.)
  • A. It adds extra security with the capabilities of an enterprise-grade firewall in the EVPN-VXLAN underlay.
  • B. It enhances tunnel inspection for VXLAN encapsulated traffic with Layer 4-7 security services.
  • C. It enhances tunnel inspection for VXLAN encapsulated traffic with only Layer 4 security services.
  • D. It adds extra security with the capabilities of an enterprise-grade firewall in the EVPN-VXLAN overlay.
Answer: B,D
Explanation:
The SRX Series can inspect traffic within VXLAN tunnels, providing in-depth security services across multiple layers. Adding SRX in the overlay network allows comprehensive control, leveraging advanced firewall capabilities. For more details, see Juniper EVPN-VXLAN Security.
When integrating an SRX Series device into anEVPN-VXLANsolution, it offers several security benefits:
* Layer 4-7 Security Services (Answer A): The SRX can providedeep packet inspectionfor VXLAN encapsulated traffic, enhancing security by offering services such as intrusion prevention, application layer filtering, and antivirus scanning. This allows security monitoring of the encapsulated traffic at higher layers of the OSI model (Layers 4-7), which is essential for advanced threat detection.
* Security in the Overlay Network (Answer C): The SRX adds security by functioning as an enterprise- grade firewall within theEVPN-VXLAN overlay. This means that traffic flowing between virtualized segments or networks can be inspected and filtered using SRX firewall rules, ensuring that the VXLAN overlay remains secure.
These features make the SRX a powerful addition for securing EVPN-VXLAN environments, providing comprehensive security for encapsulated traffic and ensuring that both the underlay and overlay networks are protected.

NEW QUESTION # 77
Exhibit:

You are configuring NAT64 on your SRX Series device. You have committed the configuration shown in the exhibit. Unfortunately, the communication with the 10.10.201.10 server is not working. You have verified that the interfaces, security zones, and security policies are all correctly configured.
In this scenario, which action will solve this issue?
  • A. Configure proxy-NDP on the IPv6 interface for the 2001:db8::1/128 address.
  • B. Configure source NAT to translate return traffic from IPv4 address to the IPv6 address of your source device.
  • C. Configure destination NAT to translate return traffic from the IPv4 address to the IPv6 address of your source device.
  • D. Configure proxy-ARP on the external IPv4 interface for the 10.10.201.10/32 address.
Answer: B
Explanation:
In the scenario described, you are configuring NAT64, which allows communication between IPv6 and IPv4 networks by translating IPv6 packets to IPv4 and vice versa. The configuration in the exhibit shows an attempt to translate traffic coming from the IPv6 address 2001:db8::1/128 and destined for the IPv4 address
10.10.201.10/32.
However, the issue here is related to the return traffic. For NAT64 to function correctly, you must ensure that the return traffic (from the IPv4 network) is translated back to the original IPv6 source address. Without proper translation of the return traffic, the communication will not be successful. In this case, you needsource NATto handle the return traffic correctly.
Detailed Solution:
* In NAT64, when traffic originates from an IPv6 network and is translated to IPv4, the return traffic from the IPv4 network must be translated back to the original IPv6 address usingsource NAT.
* The source NAT configuration must include translation for the return path from IPv4 to IPv6 to ensure bidirectional communication.
Configuration Example:
To resolve the issue, you can configure source NAT on the SRX device to handle the translation of the return traffic as follows:
* Configure Source NAT for Return Traffic:You need to configure source NAT on the interface handling the return traffic. This will translate the IPv4 address back to the IPv6 source address.
Example:
bash
Copy code
set security nat source rule-set ipv4-source-rule from zone untrust
set security nat source rule-set ipv4-source-rule to zone trust
set security nat source rule-set ipv4-source-rule rule source-nat-translation match source-address 10.10.201.10
/32
set security nat source rule-set ipv4-source-rule rule source-nat-translation then source-nat pool ipv6-source- pool
* Ensure Proper Routing and Security Policy Configuration:Make sure that both the IPv4 and IPv6 routes are correctly defined, and that security policies are allowing the return traffic through.
Use the following commands to verify the NAT and policy configurations:
bash
Copy code
show security nat source
show security policies
By configuring source NAT to translate the return traffic back to IPv6, the communication between the IPv6 host and the IPv4 server should now work correctly.
Juniper Security Reference:
* NAT64 Overview: This functionality allows IPv6 clients to communicate with IPv4-only servers. For successful translation, NAT64 requires both source NAT and destination NAT to handle the bidirectional traffic. Reference: Juniper Networks Documentation on NAT64.

NEW QUESTION # 78
You want to bypass IDP for traffic destined to social media sites using APBR, but it is not working and IDP is dropping the session.
What are two reasons for this problem? (Choose two.)
  • A. The session did not properly reclassify midstream to the correct APBR rule.
  • B. IDP disable is not configured on the APBR rule.
  • C. The APBR rule does a match on the first packet.
  • D. The application services bypass is not configured on the APBR rule.
Answer: A,D
Explanation:
* Explanation of Answer A (Session Reclassification):
* APBR (Advanced Policy-Based Routing) requires the session to be classified based on the specified rule, which can change midstream as additional packets are processed. If the session was already established before the APBR rule took effect, the traffic may not be correctly reclassified to match the new APBR rule, leading to IDP (Intrusion Detection and Prevention) processing instead of being bypassed. This can occur especially when the session was already established before the rule change.
* Explanation of Answer C (Application Services Bypass):
* For APBR to work and bypass the IDP service, theapplication services bypassmust be explicitly configured. Without this configuration, the APBR rule may redirect the traffic, but the IDP service will still inspect and potentially drop the traffic. This is especially important for traffic destined for specific sites like social media platforms where bypassing IDP is desired.
Example configuration for bypassing IDP services:
bash
Copy code
set security forwarding-options advanced-policy-based-routing profile <profile-name> application-services- bypass Step-by-Step Resolution:
* Reclassify the Session Midstream:
* If the traffic was already being processed before the APBR rule was applied, ensure that the session is reclassified by terminating the current session or ensuring the APBR rule is applied from the start.
Command to clear the session:
bash
Copy code
clear security flow session destination-prefix <ip-address>
* Configure Application Services Bypass:
* Ensure that the APBR rule includes the application services bypass configuration to properly bypass IDP or any other security services for traffic that should not be inspected.
Example configuration:
bash
Copy code
set security forwarding-options advanced-policy-based-routing profile <profile-name> application-services- bypass Juniper Security Reference:
* Session Reclassification in APBR: APBR requires reclassification of sessions in real-time to ensure midstream packets are processed by the correct rule. This is crucial when policies change dynamically or new rules are added.
* Application Services Bypass in APBR: This feature ensures that security services such as IDP are bypassed for traffic that matches specific APBR rules. This is essential for applications where performance is a priority and security inspection is not necessary.

NEW QUESTION # 79
Exhibit:


You are troubleshooting a new IPsec VPN that is configured between your corporate office and the RemoteSite1 SRX Series device. The VPN is not currently establishing. The RemoteSite1 device is being assigned an IP address on its gateway interface using DHCP.
Which action will solve this problem?
  • A. On the RemoteSite1 device, change the IKE gateway external interface to st0.0.
  • B. On both devices, change the IKE version to use version 2 only.
  • C. On both devices, change the IKE policy mode to aggressive.
  • D. On both devices, change the IKE policy proposal set to basic.
Answer: C
Explanation:
Aggressive mode is required when an IP address is dynamically assigned, such as through DHCP, as it allows for faster establishment with less identity verification.
The configuration shown in the exhibit highlights that the RemoteSite1 SRX Series device is using DHCP to obtain an IP address for its external interface (ge-0/0/2). This introduces a challenge in IPsec VPN configurations when the public IP address of the remote site is not static, as is the case here. Aggressive mode in IKE (Internet Key Exchange) is designed for situations where one or both peers have dynamically assigned IP addresses. In this scenario, aggressive mode allows the devices to exchange identifying information, such as hostnames, rather than relying on static IP addresses, which is necessary when the remote peer (RemoteSite1) has a dynamic IP from DHCP. Correct Action (D): Changing the IKE policy mode to aggressive will resolve the issue by allowing the two devices to establish the VPN even though one of them is using DHCP. In aggressive mode, the initiator can present its identity (hostname) during the initial handshake, enabling the VPN to be established successfully.

NEW QUESTION # 80
......
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