JN0-336 Practice Questions

The correct answers are A and

D.  

In IKEv1-based IPsec VPNs, there are two distinct negotiation phases. IKEv1 Phase 1 establishes the secure and authenticated IKE channel between peers. That means the IKE SA is built during Phase 1. Juniper describes Phase 1 as the negotiation of proposals for how to authenticate and secure the channel, including encryption algorithms, authentication algorithms, Diffie-Hellman group, and authentication method.

IKEv1 Phase 2 then uses that secure channel to negotiate the IPsec SAs that protect actual user traffic through the VPN. Juniper states that Phase 2 negotiates security associations to secure the data traversing the IPsec tunnel, and that the Phase 2 proposal includes the security protocol, such as ESP or AH, plus the selected encryption and authentication algorithms. Option B is wrong because IKEv1 SAs are not established in Phase 2; Phase 2 creates IPsec SAs. Option C is wrong because Phase 1 does not create the data-plane IPsec SA; it creates the secure IKE control channel used for Phase 2 negotiation. Reference topics: IPsec VPN, IKEv1 Phase 1, IKE SA, IKEv1 Phase 2, IPsec SA, ESP/AH proposals.

The correct answers are B and

D.  

The command output is from the SRX Series device: show services user-identification identity-management status. Under Primary server, the exhibit shows Address: 192.168.1.10, Port: 443, Connection method: HTTPS, and Connection status: Online. In Juniper Identity Management Service integration, the SRX is the client that connects to the configured primary JIMS server. Juniper’s configuration workflow specifically describes configuring “the IP address of the primary JIMS server” under services user-identification identity-management connection primary address, and the verification output shows that primary server address with its connection status.

Option A is wrong because 192.168.1.10 is listed under Primary server, not as the local SRX address. Option C is also wrong because this SRX command verifies the SRX-to-JIMS identity-management connection, not the backend JIMS-to-domain-controller connection. Domain controller reachability would be validated from JIMS or through JIMS-specific status/monitoring, not by this SRX-side output. The displayed Online state and OK (200) status confirm that the SRX successfully reached the JIMS HTTPS service and received a valid response. Juniper examples use the same status command to validate that the SRX identity-management connection to JIMS is online.

Reference topics: Identity-Aware Security Policies, Juniper Identity Management Service, SRX-to-JIMS connectivity, identity-management status verification.

The correct answers are B and

C.  

Juniper ATP Cloud improves security by delivering cloud-based threat detection, malware analysis, and enforcement integration with SRX Series Firewalls. Juniper describes ATP Cloud as using shared cloud intelligence so customers benefit from new threat intelligence in near real time. It also provides zero-day threat protection, machine-learning-based malware detection, inline malware blocking, and policy actions that can stop malware, quarantine infected systems, prevent data exfiltration, and disrupt lateral movement.

Option C is also correct because Juniper ATP Cloud uses dynamic analysis, commonly called sandboxing. In this process, a suspicious file is executed in a secure environment while tools monitor its activity. Juniper further explains that ATP Cloud uses deception techniques to make the sandbox appear like a real user environment, including simulated mouse movement, keystrokes, common software packages, realistic network access, stored credentials, and vulnerable OS areas. This encourages evasive malware to execute and reveal malicious behavior.

Option A is weaker and not the best answer because logging alone is not the key ATP Cloud security-improvement mechanism being tested. Option D is wrong because ATP Cloud is a threat-prevention service, not a performance-acceleration technology. Reference topics: ATP Cloud, malware analysis, dynamic sandboxing, machine learning, threat intelligence, inline malware blocking.

The correct answers are B and

C.  

IDP false positives occur when legitimate traffic matches an attack signature or attack object incorrectly. One valid way to reduce false positives is to remove the problematic attack object from the IDP rule, especially when that object is not relevant to the protected application, server role, or traffic direction. Juniper defines attack objects as the items specified in IDP rules to identify malicious activity, so removing an irrelevant or noisy attack object directly reduces unwanted matches.

Option C is also correct because Juniper specifically recommends using an exempt rulebase when an IDP rule uses an attack object group containing attack objects that produce false positives or irrelevant log records. Exempt rules can exclude a specific source, destination, or source/destination pair from matching an IDP rule, preventing unnecessary alarms.

Option A is wrong because changing the action to a lower severity response does not reduce the false positive; it only changes what happens after the false match occurs. Option D is wrong because a terminal rule at the end of the rule base does not prevent earlier false-positive matches. Reference topics: IDP, attack objects, exempt rulebase, false-positive tuning, IDP rule matching.

The correct answers are A and

B.  

In an SRX chassis cluster, the cluster ID identifies the chassis cluster itself, while the node ID identifies the individual SRX device inside that two-node cluster. Juniper states that a cluster is identified by a cluster-id value from 1 through 255, and that setting the cluster ID to 0 is equivalent to disabling clustering. Therefore, option A is correct and option C is wrong.

Option B is also correct because Juniper states that a cluster node is identified by a node ID specified as a number from 0 through 1. A normal SRX chassis cluster has two nodes: node0 and node1. The two devices must use the same nonzero cluster ID so they belong to the same cluster, but each device must use a different node ID so Junos can apply node-specific configuration, interface numbering, redundancy-group ownership, and management settings correctly. Option D is wrong because node IDs do not range from 1 through 255; that range applies to cluster IDs, not node IDs. Reference topics: HA Clustering, cluster ID, node ID, chassis cluster formation, node0/node1 identification.