JN0-336 Exam Dumps - Security, Specialist (JNCIS-SEC)

The correct answer is A. The same cluster ID was used on both clusters. In an SRX chassis cluster, a redundant Ethernet interface, or reth, uses a cluster-derived virtual MAC address. When two separate chassis clusters are placed in the same Layer 2 domain and use the same cluster ID, their corresponding reth interfaces can generate the same virtual MAC address. That is exactly why the network team sees the same MAC address for reth0 from both clusters on VLAN 1042. Juniper community guidance states bluntly that the reth interface MAC address is derived from the cluster ID and that two clusters using the same ID produce identical MAC addresses.

Option B is wrong because split-brain would describe both nodes inside the same cluster thinking they are primary, not two separate chassis clusters producing the same reth MAC address. Option C is wrong because multiple SRX clusters can exist on the same VLAN if their cluster IDs are unique. Option D is wrong because LACP synchronization affects bundled link operation, not the generation of the reth virtual MAC address. The correction is to assign unique cluster IDs to clusters sharing the same Layer 2 segment. Reference topics: HA Clustering, chassis cluster ID, reth virtual MAC address, duplicate MAC prevention, Layer 2 cluster design.

The correct answers are A and B. In an SRX chassis cluster, the cluster ID identifies the chassis cluster, and valid operational cluster IDs are nonzero values. Juniper’s chassis cluster command documentation states that the system uses the chassis cluster ID and node ID to apply the correct node-specific configuration, and the command writes the chassis cluster ID and node ID to EPROM. When the cluster ID is set to 0, clustering is disabled; therefore, the HA cluster configuration is effectively ignored because the device is no longer operating as a chassis-cluster member.

Option B is also correct because Juniper states that chassis cluster ID and node ID changes take effect only after the system is rebooted. That is why the operational command format includes the reboot behavior when setting cluster-id and node. Option C is wrong because node ID 0 is valid; it identifies node0 in the two-node cluster. Option D is wrong because SRX chassis clusters use node IDs 0 and 1 only; the 1–255 range applies to cluster IDs, not node IDs. Reference topics: HA Clustering, cluster ID, node ID, EPROM, chassis cluster enablement, node-specific configuration.

The correct answers are A, B, and D. In Security Director, the Shared Objects workspace is used for reusable objects that can be referenced by policies across managed devices. Juniper documentation shows that address objects are created from Configure > Shared Objects > Addresses, and those address objects can be used across devices in firewall, NAT, IPS, and VPN services. This supports option B, because IP address/address objects are classic shared objects.

Option A is correct because Geo IP policies are created from Configure > Shared Objects > Geo IP. Juniper’s procedure explicitly places Geo IP under the Shared Objects path. Option D is also correct because policy enforcement groups are created from Configure > Shared Objects > Policy Enforcement Groups and are used to group endpoints such as IP addresses, subnets, or locations for policy-enforcement workflows.

Option C is wrong because audit logs are monitoring records, not reusable shared objects; Juniper places them under Monitor > Audit Logs, where they track login history and user-initiated tasks. Option E is wrong because policy rules are created and managed inside firewall, NAT, IPS, or threat policies, not as independent Shared Objects. Reference topics: Security Director, Shared Objects, address objects, Geo IP, policy enforcement groups.

The correct answers are C and D. The exhibit shows ESP encrypted bytes = 0, ESP decrypted bytes = 0, encrypted packets = 0, and decrypted packets = 0. That means no traffic is successfully passing through the IPsec tunnel. Juniper’s show security ipsec statistics command displays ESP encrypted/decrypted packet and byte counters, so zero values on these counters indicate that the tunnel is not successfully carrying protected ESP traffic.

Option C is also correct because the output shows ESP authentication failures and ESP decryption failures. Since ESP is the IPsec protocol responsible for encrypted payload handling, failures in ESP authentication/decryption point to an ESP/IPsec Phase 2 mismatch or incorrect configuration, such as mismatched authentication algorithm, encryption algorithm, keys, proposal parameters, or incompatible negotiated SA settings. Juniper’s IPsec overview explains that Phase 2 negotiates the IPsec SA used to authenticate traffic flowing through the tunnel, so ESP-related failures belong to the IPsec/ESP configuration path rather than AH.

Option A is wrong because the AH counters and AH authentication failures are zero; the evidence is not pointing to AH. Option B is unsupported because the output does not show peer reboot behavior. Reference topics: IPsec VPN, ESP statistics, Phase 2/IPsec SA negotiation, ESP authentication failures, ESP decryption failures.

The correct answer is B. ESP. In IPsec, the security protocol responsible for encrypting protected traffic is Encapsulating Security Payload (ESP). Juniper defines ESP as the IPsec protocol used for encrypting the IP packet and authenticating its contents. In practical SRX VPN design, ESP is the normal protocol selected when confidentiality is required because it can provide encryption, packet integrity, authentication, and anti-replay protection depending on the configured IPsec proposal.

Option A, SHA-1, is incorrect because SHA-1 is an authentication/hash algorithm, not an IPsec security protocol and not a payload encryption mechanism. Option C, AH, is incorrect because Authentication Header validates packet source and integrity but does not encrypt payload data. AH is therefore unsuitable when the requirement explicitly says payload data must be encrypted. Option D, PFS, is incorrect because Perfect Forward Secrecy is a key-exchange property used during Phase 2 rekeying; it strengthens key independence but does not itself encrypt packets. In Junos IPsec configuration logic, the security protocol decision is between ESP and AH, and encryption requires ESP. Reference topics: IPsec VPN, ESP, AH, IPsec security protocols, payload confidentiality, IPsec proposal design.

The correct answer is A. Manually configure and apply an SSL proxy profile. HTTPS traffic is encrypted, so ATP Cloud cannot extract and submit downloaded files for malware analysis unless the SRX can decrypt the SSL/TLS session first. Juniper’s ATP Cloud documentation states that to detect malware in HTTPS traffic, you must configure the SSL inspection CA used for SSL forward proxy, and the ATP Cloud policy workflow specifically includes configuring an SSL proxy profile to inspect HTTPS traffic. Juniper’s example shows the SSL proxy profile being created with a root CA and then applied so HTTPS sessions can be inspected before advanced anti-malware processing occurs.

Option B is wrong because lowering the threat score only changes the enforcement threshold after a file verdict is returned; it does not solve the inability to inspect encrypted payloads. Option C is wrong because changing the ATP device profile alone does not decrypt HTTPS traffic. The exhibit already shows a malware profile and HTTP file-download configuration, but HTTPS malware detection still requires SSL proxy. Option D is wrong because Junos ATP Cloud integration does not require redirecting encrypted traffic to a separate decryption appliance for this task. The SRX performs SSL forward proxy locally, then advanced anti-malware can inspect extracted content. Reference topics: ATP Cloud, HTTPS malware inspection, SSL forward proxy, SSL inspection CA, advanced anti-malware policy.

The correct answers are A and C. Juniper ATP Cloud uses a malware-analysis pipeline. When a file is submitted, the first step is a cache lookup based on the file hash. Juniper explains that if the file has already been analyzed, the stored verdict is returned to the SRX Series Firewall and there is no need to re-analyze the file. That directly supports C and eliminates B, because analysis does not continue when a cached verdict is found.

If the cache lookup does not return a verdict, the remaining ATP Cloud analysis techniques are used. Juniper describes the pipeline model in which each analysis technique creates a verdict number, and those verdicts are combined into a final verdict score from 0 to 10. That final threat score is what the SRX compares against ATP Cloud policy settings to permit or block the session.

Option D is wrong because ATP Cloud does not simply return the first score generated by any one feature. The expected behavior is cumulative/final scoring across the remaining analysis pipeline. Reference topics: Juniper ATP Cloud, malware analysis pipeline, cache lookup, verdict number, threat score, SRX enforcement.

The correct answer is D. AppQoS. The requirement is not to block, permit, translate, or inspect SIP signaling; it is to prioritize VoIP traffic on a low-bandwidth branch link. Juniper Application QoS, or AppQoS, is designed exactly for this purpose. Juniper states that AppQoS provides the ability to prioritize and meter application traffic so business-critical or high-priority application traffic receives better service. It can classify traffic by application, assign forwarding classes, rewrite DSCP values, set loss priority, and apply rate limiters.

Option A, AppFW, is wrong because AppFW controls application access; it is used to permit, deny, reject, or log application traffic, not primarily to prioritize voice traffic. Option B, SIP ALG, is wrong because the SIP ALG helps inspect and handle SIP control traffic and related media pinholes, but it is not a QoS prioritization service. Option C, AppQoE, is not the correct SRX edge service being tested here. For cloud-based VoIP under a broad outbound permit rule, AppQoS is the correct service because it can identify the VoIP application and give it better treatment during congestion. Reference topics: AppQoS, application traffic control, VoIP prioritization, DSCP rewrite, forwarding class, rate limiting.