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| Section | Objectives |
|---|---|
| Topic 1: Juniper Advanced Threat Prevention (ATP) Cloud | - ATP Cloud concepts
|
| Topic 2: Identity-Aware Security Policies | - Identity concepts
|
| Topic 3: IPsec VPN | - Operations and troubleshooting
|
| Topic 4: Security Director (Junos Space) | - Management platform
|
| Topic 5: Intrusion Detection and Prevention (IDP) | - IDP concepts and architecture
|
| Topic 6: SSL Proxy | - SSL inspection concepts
|
| Topic 7: High Availability (HA) Clustering | - Chassis cluster operations
|
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質問 # 39
You are troubleshooting unexpected issues on your JIMS server due to out of order event log timestamps.
Which action should you take to solve this issue?
正解：D
解説：
To solve the issue of out of order event log timestamps on your JIMS server, you should enable time synchronization on the domain controllers. JIMS (Juniper Identity Management Service) is a Windows service that collects user, device, and group information from Active Directory domains or syslog sources and provides it to SRX Series devices and CSO for identity-based security policies. JIMS relies on the timestamps of the event logs generated by the domain controllers to track user logins, logouts, and IP address changes. If the domain controllers have different or inaccurate clocks, the event logs may have out of order or incorrect timestamps, which can cause JIMS to miss or misinterpret some events and affect its accuracy and performance. Therefore, you should ensure that all the domain controllers in your network are synchronized with a reliable time source, such as an NTP server or a Windows Time service. Reference: = Juniper Identity Management Service User Guide, Juniper Identity Management Service Feature Guide, Configure JIMS Collector to Get Microsoft Event Logs, Considerations for timestamps in centralized logging platforms
質問 # 40
Which two statements accurately describe the role of hashing in VPNs? (Choose two.)
正解：C、D
解説：
The correct answers are B and D. In VPN cryptography, hashing is used for authentication and integrity checking, not confidentiality. Juniper's IPsec documentation describes MD5 as producing a 128-bit hash, also called a digital signature or message digest, from a message of arbitrary length. It also describes SHA as producing a 160-bit hash from a message of arbitrary length. That directly supports option B because a hash function takes variable-length input and produces a fixed-size digest.
Option D is also correct because Juniper states that the resulting hash is used like a fingerprint of the input to verify content and source authenticity and integrity. Juniper's IPsec overview further explains that Junos compares the calculated message digest against the expected digest to verify that the message has not been tampered with.
Option A is wrong because hashing is not compression; it is one-way digest generation. Option C is wrong because encryption protects confidentiality, while hashing validates integrity and authenticity. In IPsec, algorithms such as AES, DES, and 3DES provide encryption, while MD5, SHA-1, and SHA-2 provide hashing/HMAC-based authentication. Reference topics: IPsec VPN, hashing, HMAC, MD5, SHA, message digest, data integrity.
質問 # 41
Referring to the exhibit, which two statements are correct? (Choose two.)
正解：B、D
解説：
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.
質問 # 42
Which two statements are correct about a policy scheduler? (Choose two.)
正解：A、D
解説：
A policy scheduler is a feature that allows a security policy to be activated or deactivated for a specified time period. You can define schedulers for a single or recurrent time slot within which a policy is active.
Two statements that are correct about a policy scheduler are:
A policy scheduler can be defined using a daily schedule: You can configure a scheduler to be active every day for a certain time interval, such as from 8:00 AM to 5:00 PM. You can also exclude specific days from the daily schedule, such as weekends or holidays.
A policy scheduler determines the time frame that a security policy is actively evaluated: When you associate a scheduler with a security policy, the policy is only available for policy lookup during the time frame specified by the scheduler. When the scheduler is off, the policy is inactive and cannot be matched by any traffic.
Reference: = Scheduling Security Policies, Configuring Schedulers for a Daily Schedule Excluding One Day
質問 # 43
Referring to the exhibit, which two statements are correct? (Choose two.)
正解：A、D
解説：
The correct answers are A and B. The exhibit shows show chassis cluster statistics. Under Control link statistics, Control link 0 has heartbeat packets sent and received, with heartbeat packet errors: 0. That is the clearest indication that the control link is operating normally. Juniper describes chassis-cluster control-plane verification as checking control-link heartbeat packets sent and received, along with heartbeat errors. If both send and receive counters are incrementing and errors are zero, the control link is functioning.
Option A is also correct because under Fabric link statistics, Child link 0 shows probes sent and probes received. Juniper uses fabric-link probe counters to verify fabric-link operation; nonzero sent and received probe counters indicate that the link is participating in fabric monitoring. Option C is not the safest conclusion from this exhibit alone. Child link 1 shows zero probes sent and received, but the output does not prove that a second fabric child link is configured and failing; it could simply be unused or not configured in this deployment. Option D is directly contradicted by the healthy heartbeat counters. Reference topics: HA Clustering, chassis cluster statistics, control-link heartbeat, fabric-link probes, cluster health verification.
質問 # 44
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