Updated PDF (New 2025) Actual Juniper JN0-637 Exam Questions
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NEW QUESTION # 58
You have cloud deployments in Azure, AWS, and your private cloud. You have deployed multicloud using security director with policy enforcer to. Which three statements are true in this scenario?
(Choose three.)
- A. You can simultaneously manage the security policies in all three domains.
- B. The Policy Enforcer is able to flag infected hosts in all three domains.
- C. You must secure the policies individually by domain.
- D. You can run Juniper ATP scans only on traffic from your private cloud.
- E. You can run Juniper ATP scans for all three domains.
Answer: A,B,E
NEW QUESTION # 59
You want to enroll an SRX Series device with Juniper ATP Appliance. There is a firewall device in the path between the devices.
In this scenario, which port should be opened in the firewall device?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 60
You are configuring an interconnect logical system that is configured as a VPLS switch to allow two logical systems to communicate.
Which two parameters are required when configuring the logical tunnel interfaces? (Choose two.)
- A. Encapsulation ethernet-vpls must be used.
- B. The logical tunnel interfaces should be configured with two logical unit pairs per logical system interconnect.
- C. Encapsulation ethernet must be used.
- D. The virtual tunnel interfaces should only be configured with two logical unit pairs per logical system interconnect.
Answer: A,B
Explanation:
Explanation:
NEW QUESTION # 61
All interfaces involved in transparent mode are configured with which protocol family?
- A. inet
- B. bridge
- C. mpls
- D. ethernet - switching
Answer: B
NEW QUESTION # 62
You want to create a connection for communication between tenant systems without using physical revenue ports on the SRX Series device.
What are two ways to accomplish this task? (Choose two.)
- A. Use a secure wire.
- B. Use an external router.
- C. Use an interconnect VPLS switch.
- D. Use a point-to-point logical tunnel.
Answer: C,D
Explanation:
Explanation:
NEW QUESTION # 63
Exhibit
Which two statements are correct about the output shown in the exhibit? (Choose two.)
- A. The packet is silently discarded.
- B. The packet is part of a new session.
- C. The packet is explicitly rejected.
- D. The packet is part of an existing session.
Answer: B,C
NEW QUESTION # 64
Exhibit
You are not able to ping the default gateway of 192.168 100 1 (or your network that is located on your SRX Series firewall.
Referring to the exhibit, which two commands would correct the configuration of your SRX Series device? (Choose two.)
- A.
- B.
- C.
- D.
Answer: A,C
NEW QUESTION # 65
Exhibit:
Referring to the flow logs exhibit, which two statements are correct? (Choose two.)
- A. The data shown requires a traceoptions flag of host-traffic.
- B. The packet is dropped by a configured security policy.
- C. The packet is dropped by the default security policy.
- D. The data shown requires a traceoptions flag of basic-datapath.
Answer: C,D
Explanation:
* Understanding the Flow Log Output:
From the flow logs in the exhibit, we can observe the following key events:
* The session creation was initiated (flow_first_create_session), but the policy search failed (flow_first_policy_search), which implies that no matching policy was found between the zones involved (zone trust-> zone dmz).
* The packet was dropped with the reason "denied by policy." This shows that the packet was dropped either due to no matching security policy or because the default policy denies the traffic (packet dropped, denied by policy).
* The line denied by policy default-policy-logical-system-00(2) indicates that the default security policy is responsible for denying the traffic, confirming that no explicit security policy was configured to allow this traffic.
* Explanation of Answer A (Dropped by the default security policy):
The log message clearly states that the packet was dropped by the default security policy (default-policy- logical-system-00). In Junos, when a session is attempted between two zones and no explicit policy exists to allow the traffic, the default policy is to deny the traffic. This is a common behavior in Junos OS when a security policy does not explicitly allow traffic between zones.
* Explanation of Answer D (Requires traceoptions flag of basic-datapath):
The information displayed in the log involves session creation, flow policy search, and packet dropping due to policy violations, which are all part of basic packet processing in the data path. This type of information is logged when the traceoptions flag is set to basic-datapath. The basic-datapath traceoption provides detailed information about the forwarding process, including policy lookups and packet drops, which is precisely what we see in the exhibit.
* The traceoptions flag host-traffic (Answer C) is incorrect because host-traffic is typically used for traffic destined to or generated from the Junos device itself (e.g., SSH or SNMP traffic to the SRX device), not for traffic passing through the device.
* To capture flow processing details like those shown, you need the basic-datapath traceoptions flag, which provides details about packet forwarding and policy evaluation.
Step-by-Step Configuration for Tracing (Basic-Datapath):
* Enable flow traceoptions:
To capture detailed information about how traffic is being processed, including policy lookups and flow session creation, enable traceoptions for the flow.
bash
set security flow traceoptions file flow-log
set security flow traceoptions flag basic-datapath
* Apply the configuration and commit:
bash
commit
* View the logs:
Once enabled, you can check the trace logs for packet flows, policy lookups, and session creation details:
bash
show log flow-log
This log will contain information similar to the exhibit, including session creation attempts and packet drops due to security policy.
Juniper Security Reference:
* Default Security Policies: Juniper SRX devices have a default security policy to deny all traffic that is not explicitly allowed by user-defined policies. This is essential for security best practices. Reference:
Juniper Networks Documentation on Security Policies.
* Traceoptions for Debugging Flows: Using traceoptions is crucial for debugging and understanding how traffic is handled by the SRX, particularly when issues arise from policy misconfigurations or routing. Reference: Juniper Traceoptions.
By using the basic-datapath traceoptions, you can gain insights into how the device processes traffic, including policy lookups, route lookups, and packet drops, as demonstrated in the exhibit.
NEW QUESTION # 66
Exhibit:
You have deployed a pair of SRX series devices in a multimode HA environment. You need to enable IPsec encryption on the interchassis link.
Referring to the exhibit, which three steps are required to enable ICL encryption? (Choose three.)
- A. Enable HA link encryption in the IKE profile on both nodes,
- B. Enable OSPF for both interchassis link interfaces and tum on the dynamic-neighbors parameter.
- C. Enable HA link encryption in the IPsec profile on both nodes.
- D. Install the Junos IKE package on both nodes.
- E. Configure a VPN profile for the HA traffic and apply to both nodes.
Answer: C,D,E
Explanation:
* A. Install the Junos IKE package on both nodes. While I previously stated that IKE is usually included in the base Junos OS image, it's essential to ensure that the necessary IKE package is indeed installed and enabled on both SRX nodes to support ICL encryption.
* C. Configure a VPN profile for the HA traffic and apply it to both nodes. This dedicated VPN profile defines the security parameters (encryption algorithms, authentication, etc.) specifically for the ICL traffic.
* D. Enable HA link encryption in the IPsec profile on both nodes. Within the IPsec profile, you must explicitly enable ICL encryption to ensure that all traffic traversing the interchassis link is protected.
Why E is incorrect:
* E. Enable HA link encryption in the IKE profile on both nodes. While securing IKE negotiations is important, it's typically handled within the IPsec profile itself when configuring ICL encryption on SRX devices.
NEW QUESTION # 67
You are configuring an interconnect logical system that is configured as a VPLS switch to allow two logical systems to communicate.
Which two parameters are required when configuring the logical tunnel interfaces? (Choose two.)
- A. The logical tunnel interfaces should be configured with two logical unit pairs per logical system interconnect.
- B. Encapsulation ethernet-vpls must be used.
- C. The virtual tunnel interfaces should only be configured with two logical unit pairs per logical system interconnect.
- D. Encapsulation ethernet must be used.
Answer: A,D
Explanation:
When configuring interconnect logical systems to act as a VPLS switch between two logical systems, the following configurations are necessary:
* Encapsulation Ethernet (Answer A): The logical tunnel interface must be configured with encapsulation ethernet. This allows the interface to carry Ethernet traffic between the logical systems.
Command Example:
bash
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set interfaces lt-0/0/0 encapsulation ethernet
* Two Logical Unit Pairs (Answer C): Each logical tunnel interface should have two logical unit pairs defined to facilitate communication between the two logical systems. One logical unit pair connects each logical system.
Command Example:
bash
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set interfaces lt-0/0/0 unit 0 family ethernet-switching
set interfaces lt-0/0/0 unit 1 family ethernet-switching
These settings are necessary for creating a logical tunnel for VPLS and allowing traffic between the logical systems.
NEW QUESTION # 68
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 change the loss priorities of the forwarding classes to low.
- B. You must use inet precedence instead of DSCP.
- C. You must delete one forwarding class.
- D. You must change the code point for the DB-data forwarding class to 10000.
Answer: C
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.
NEW QUESTION # 69
You have a webserver and a DNS server residing in the same internal DMZ subnet. The public Static NAT addresses for the servers are in the same subnet as the SRX Series devices internet-facing interface. You implement DNS doctoring to ensure remote users can access the webserver.
Which two statements are true in this scenario? (Choose two.)
- A. The Proxy ARP feature must be configured.
- B. The DNS CNAME record is translated.
- C. The DNS doctoring ALG is enabled by default.
- D. The DNS doctoring ALG is not enabled by default.
Answer: A,C
NEW QUESTION # 70
Exhibit
Referring to the exhibit, which statement is true?
- A. This custom block list feed will be used before the Juniper Seclntel
- B. This custom block list feed cannot be saved if the Juniper Seclntel block list feed is configured.
- C. This custom block list feed will be used instead of the Juniper Seclntel block list feed
- D. This custom block list feed will be used after the Juniper Seclntel block list feed.
Answer: D
NEW QUESTION # 71
Which method does an SRX Series device in transparent mode use to learn about unknown devices in a network?
- A. packet flooding
- B. IGMP snooping
- C. RSTP
- D. LLDP-MED
Answer: A
NEW QUESTION # 72
Exhibit
Referring to the exhibit, an internal host is sending traffic to an Internet host using the 203.0.113.1 reflexive address with source port 54311.
Which statement is correct in this situation?
- A. Any host on the Internet can initiate traffic to reach the internal host using the 203.0.113.1 address, source port 54311, and a random destination port.
- B. Only the Internet host that the internal host originally communicated with can initiate traffic to reach the internal host using the 203.0.113.1 address, source port 54311, and a random destination port.
- C. Any host on the Internet can initiate traffic to reach the internal host using the 203.0.113.1 address, a random source port, and destination port54311.
- D. Only the Internet host that the internal host originally communicated with can initiate traffic to reach the internal host using the 203.0 113.1 address, a random source port, and destination port 54311.
Answer: A
NEW QUESTION # 73
Exhibit
You are trying to configure an IPsec tunnel between SRX Series devices in the corporate office and branch1. You have committed the configuration shown in the exhibit, but the IPsec tunnel is not establishing.
In this scenario, what would solve this problem.
- A. Change the local identity to inet advpn on the branch1 device.
- B. Change the IKE mode to aggressive on the branch1 and corporate devices.
- C. Add multipoint to the st0.0 interface configuration on the branch1 device.
- D. Change the IKE proposal-set to compatible on the branch1 and corporate devices.
Answer: A
NEW QUESTION # 74
Referring to the exhibit,
which two statements are correct about the NAT configuration? (Choose two.)
- A. The original destination port is used for the source port for the session.
- B. Any external host will be able to initiate a session to the reflexive address.
- C. Both the internal and the external host can initiate a session after the initial translation.
- D. Only a specific host can initiate a session to the reflexive address after the initial session.
Answer: A,D
Explanation:
The NAT setup allows only specific external hosts to reach the internal network post-initial session, providing controlled access. Reflexive NAT preserves the source port from the original request, maintaining continuity.
More on this can be found in Juniper NAT Configuration Documentation.
Looking at the NAT configuration, we observe the use ofpersistent NATwith the keywordpermit target-host
. Here's a detailed breakdown:
* Persistent NAT (Correct: Option B):Whenpersistent NATis configured with thepermit target-host option, it allows the internal host (from the 172.16.1.0/24 network) to initiate communication with an external host. After the initial session is established, only the specific external host (target host) is allowed to initiate subsequent sessions to the internal host using the reflexive address. This ensures that random external hosts cannot initiate sessions, which enhances security.
* Original Destination Port Reuse (Correct: Option D):In this configuration, theinterface-based source NATuses the original destination port of the incoming session as the source port for the outbound session. This maintains port transparency for NATed traffic, which can be crucial for certain types of applications that depend on consistent port numbers.
* Incorrect Options:
* Option Ais incorrect because persistent NAT with target-host does not allow both internal and external hosts to initiate sessions freely. Only the specific external hostcan initiate a session after the initial session is established by the internal host.
* Option Cis incorrect because only the specific external host can initiate subsequent sessions, not any random external host.
Juniper References:
* Juniper NAT Documentation: Describes the behavior of persistent NAT and how target-host restrictions work for enhanced security.
NEW QUESTION # 75
Exhibit:
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.)
- A. Enable the copy-outer-dscp parameter so that DSCP header values are copied to the tunneled packets.
- B. Create a firewall filter that identifies VoIP traffic and associates it with the correct forwarding class.
- C. Enable the multi-sa parameter to enable two separate IPsec SAs for the VoIP and data traffic.
- D. Configure CoS forwarding classes and scheduling parameters.
- E. Enable next-hop tunnel binding.
Answer: B,D,E
Explanation:
In this scenario, you are prioritizing VoIP traffic over data traffic across an IPsec VPN. Here are the necessary actions:
* Enable next-hop tunnel binding (Answer A): This is required to bind the VPN traffic to a specific tunnel interface (like st0.0). It allows differentiated forwarding behavior (like prioritizing VoIP) for specific traffic types.
Command Example:
bash
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set interfaces st0.0 next-hop-tunnel-service
* Create a firewall filter (Answer B): The filter will match VoIP traffic based on criteria such as DSCP marking or ports (like port 5060 for SIP). Once identified, the traffic will be associated with a forwarding class, ensuring it gets prioritized.
Command Example:
bash
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set firewall family inet filter VoIP-Filter term VoIP from protocol udp set firewall family inet filter VoIP-Filter term VoIP from port 5060 set firewall family inet filter VoIP-Filter term VoIP then forwarding-class voice
* Configure CoS (Class of Service) forwarding classes (Answer C): CoS parameters define how the SRX handles different types of traffic (scheduling, shaping, etc.). VoIP traffic must be assigned a higher priority than data.
Command Example:
bash
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set class-of-service forwarding-classes voice
set class-of-service forwarding-classes data
set class-of-service schedulers voice_scheduler transmit-rate percent 50 These configurations ensure that VoIP traffic is identified, classified, and forwarded with priority.
NEW QUESTION # 76
Exhibit:
You are troubleshooting a firewall filter shown in the exhibit that is intended to log all traffic and block only inbound telnet traffic on interface ge-0/0/3.
How should you modify the configuration to fulfill the requirements?
- A. Modify the log-all term to add the next term action
- B. Apply a firewall filter to the loopback interface that blocks Telnet traffic
- C. Delete the log-all term
- D. Add a term before the log-all term that blocks Telnet
Answer: A
Explanation:
To modify the configuration to fulfill the requirements, you need to modify the log-all term to add the next term action.
The other options are incorrect because:
B) Deleting the log-all term would prevent logging all traffic, which is one of the requirements. The log-all term matches all traffic from any source address and logs it to the system log file1.
C) Adding a term before the log-all term that blocks Telnet would also prevent logging all traffic, because the log-all term would never be reached. The firewall filter evaluates the terms in sequential order and applies the first matching term. If a term before the log-all term blocks Telnet, then the log-all term would not match any traffic and no logging would occur2.
D) Applying a firewall filter to the loopback interface that blocks Telnet traffic would not block inbound Telnet traffic on interface ge-0/0/3, which is another requirement. The loopback interface is a logical interface that is always up and reachable. It is used for routing and management purposes, not for filtering traffic on physical interfaces3.
Therefore, the correct answer is A. You need to modify the log-all term to add the next term action. The next term action instructs the firewall filter to continue evaluating the subsequent terms after matching the current term. This way, the log-all term would log all traffic and then proceed to the block-telnet term, which would block only inbound Telnet traffic on interface ge-0/0/34. To modify the log-all term to add the next term action, you need to perform the following steps:
Enter the configuration mode: user@host> configure
Navigate to the firewall filter hierarchy: user@host# edit firewall family inet filter block-telnet Add the next term action to the log-all term: user@host# set term log-all then next term Commit the changes: user@host# commit Reference: log (Firewall Filter Action) Firewall Filter Configuration Overview loopback (Interfaces) next term (Firewall Filter Action)
NEW QUESTION # 77
You must setup a Ddos solution for your ISP. The solution must be agile and not block legitimate traffic.
Which two products will accomplish this task? (Choose two.)
- A. Contrail Insights
- B. SRX Series device
- C. MX Series device
- D. Corero Smartwall TDD
Answer: C,D
Explanation:
You must set up a DDoS solution for your ISP. The solution must be agile and not block legitimate traffic.
The two products that will accomplish this task are:
B) MX Series device. MX Series devices are high-performance routers that can provide DDoS protection at the network edge by integrating with Corero SmartWall Threat Defense Director (TDD) software. MX Series devices can leverage the packet processing capabilities of the MX-SPC3 Services Card to perform real-time DDoS detection and mitigation at line rate, scaling from 50 Gbps to 40 Tbps. MX Series devices can also use Juniper Networks Security Intelligence (SecIntel) to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies.
MX Series devices can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic12.
C) Corero SmartWall TDD. Corero SmartWall TDD is a software solution that runs on MX Series devices and PTX Series devices to provide DDoS protection at the network edge. Corero SmartWall TDD uses behavioral analytics and detailed network visibility to detect and block DDoS attacks in seconds, without affecting the normal traffic. Corero SmartWall TDD can also provide advanced protection from "carpet bombing" attacks, 5G DDoS visibility, and multi-tenant portal for as-a-service offerings or views by department within an enterprise. Corero SmartWall TDD can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic34.
The other options are incorrect because:
A) Contrail Insights. Contrail Insights is a software solution that provides network analytics and visibility for cloud and data center environments. Contrail Insights can help you monitor, troubleshoot, and optimize the performance and security of your network, but it does not provide DDoS protection by itself.
Contrail Insights can integrate with other Juniper products, such as Contrail Enterprise Multicloud, Contrail Service Orchestration, and AppFormix, to provide a comprehensive network management solution, but it is not a DDoS solution for your ISP5.
D) SRX Series device. SRX Series devices are high-performance firewalls that can provide DDoS protection at the network perimeter by integrating with Juniper ATP Cloud and Juniper Threat Labs. SRX Series devices can use SecIntel to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies. SRX Series devices can also use IDP to detect and prevent application-level attacks, such as SQL injection, cross-site scripting, and buffer overflow. SRX Series devices can provide a robust and effective DDoS solution for your network, but they are not designed to handle high-volume DDoS attacks at the network edge, as MX Series devices and Corero SmartWall TDD are.
Reference: Juniper and Corero Joint DDoS Protection Solution MX-SPC3 Services Card Overview Corero SmartWall Threat Defense Director (TDD) Juniper Networks and Corero: A Modern Approach to DDoS Protection at Scale Contrail Insights Overview
[SRX Series Services Gateways]
[Juniper Networks Security Intelligence (SecIntel)]
NEW QUESTION # 78
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 transparent mode.
- B. Use RIB groups.
- C. Use filter-based forwarding.
- D. Use policies.
Answer: B
Explanation:
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.
NEW QUESTION # 79
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