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| Section | Objectives |
|---|---|
| Advanced Security Policies | - Scheduling - Configuration, monitoring and troubleshooting - Session management - Logging - Unified security policies - Application Layer Gateways (ALGs) |
| Identity-Aware Security | - Integration with directory services - Identity-based policies - Juniper Identity Management Service (JIMS) |
| Application Security | - Configuration, monitoring and troubleshooting - Advanced Policy-Based Routing (APBR) - Application firewall - Application Quality of Service (QoS) - Application identification |
| Advanced Threat Prevention (ATP) | - Configuration, monitoring and troubleshooting - Juniper ATP Cloud - File analysis and threat intelligence - Juniper ATP On-Premises |
| IPsec VPNs | - VPN monitoring and troubleshooting - Remote access VPN - Site-to-site IPsec VPN |
| High Availability (HA) Clustering | - Chassis cluster configuration - Cluster architecture and concepts - Failover and synchronization - Monitoring and troubleshooting |
| Intrusion Detection and Prevention (IDP/IPS) | - Configuration, monitoring and troubleshooting - IPS policies - IPS database management |
| Juniper Secure Analytics (JSA) | - Integration with SRX devices - Log collection and analysis - Event correlation and reporting |
| Security Director | - Management and monitoring - Policy management - Deployment and configuration |
| Virtual SRX / cSRX | - Configuration and management - Resource allocation and scaling - Deployment and architecture |
| SSL Proxy | - Certificate management - Configuration and troubleshooting - SSL forward proxy - SSL reverse proxy |
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問題 #44
You are experiencing excessive packet loss on one of your two WAN links route traffic from the degraded link to the working link Which AppSecure component would you use to accomplish this task?
答案：B
解題說明：
APBR (Application Path-Based Routing) is an AppSecure component which can be used to route traffic from the degraded link to the working link in order to reduce packet loss. APBR is a policy-based routing solution that allows you to configure rules to direct traffic to the most appropriate path, based on application, user, or network metrics.
問題 #45
You are asked to ensure that traffic that matches an IDP policy is not impacted until administrators have a chance to evaluate it.
In this scenario, which IP action should be configured for the policy?
答案：C
解題說明：
The correct answer is B. ip-notify. When administrators want visibility without enforcement impact, ip-notify is the correct IP action. Juniper Security Director documentation defines IP Notify as an IP action that does not take any action against future traffic but logs the event. That is exactly the requirement in the question:
traffic matching the IDP condition must not be blocked, closed, or rate-limited until administrators have reviewed the events and decided whether enforcement is appropriate.
Option A, ip-block, is wrong because it blocks future packets matching the IP action rule. That would immediately impact traffic. Option C, ip-connection-rate-limit, is wrong because it limits the connection rate and therefore changes traffic behavior before administrators complete evaluation. Option D, ip-close, is also wrong because it closes matching future sessions by sending reset packets to the client and server, which is disruptive. In a safe evaluation or tuning phase, the proper approach is to log and observe first, then move to stronger actions such as block, close, or rate-limit only after the detected condition has been validated.
Reference topics: IDP IP actions, ip-notify, event logging, non-disruptive evaluation mode, IDP policy tuning.
問題 #46
Which three algorithms are used to encrypt IP packets? (Choose three.)
答案：A,B,C
解題說明：
The correct answers are A, D, and E. In IPsec VPN terminology, DES, 3DES, and AES are encryption algorithms used to provide confidentiality for protected IP traffic. Juniper's IPsec material identifies AES, DES, and Triple DES/3DES as IPsec encryption standards, while separating them from authentication hash algorithms such as MD5, SHA-1, and SHA-2. This distinction matters heavily in JNCIS-SEC because IPsec proposals contain different cryptographic functions: encryption protects packet confidentiality, while authentication/hash algorithms validate integrity and origin.
Option B, SHA-1, is incorrect because SHA-1 is a hashing/authentication algorithm, not an encryption algorithm. It produces a message digest used for integrity checking and authentication, commonly as an HMAC variant. Option C, MD5, is also incorrect for the same reason: MD5 is a message-digest algorithm used for authentication/integrity, not for encrypting payload data. AES is the modern preferred encryption family because it is cryptographically stronger than DES and 3DES at comparable key strengths, while DES and 3DES remain historically recognized IPsec encryption algorithms. Reference topics: IPsec VPN, IPsec proposals, encryption algorithms, authentication algorithms, DES, 3DES, AES, SHA, and MD5.
問題 #47
You are implementing an SRX Series device at a branch office that has low bandwidth and also uses a cloud- based VoIP solution with an outbound policy that permits all traffic.
Which service would you implement at your edge device to prioritize VoIP traffic in this scenario?
答案：D
解題說明：
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.
問題 #48
When a security policy is deleted, which statement is correct about the default behavior of active sessions allowed by that policy?
答案：A
解題說明：
When a security policy is deleted, the existing sessions that were previously allowed by that policy are not immediately dropped; instead, they are typically treated as legacy flows. This means they are allowed to continue until they naturally end or until the session timeout is reached. This behavior ensures that deleting a policy does not abruptly disrupt ongoing traffic flows that were previously authorized by that policy. This approach helps in avoiding unintended service disruptions, especially in production environments where active connections may be critical to operations.
問題 #49
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JN0-336資訊: https://www.kaoguti.com/JN0-336_exam-pdf.html
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