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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Policies | 20% | - Policy rules and actions - Zone-based policies - Global policies - Unified security policies |
| Topic 2: Network Address Translation | 15% | - Static NAT - Source NAT - NAT pools and rules - Destination NAT |
| Topic 3: Monitoring, Reporting and Troubleshooting | 10% | - Troubleshooting common issues - Security policy monitoring - Log and event management - Traffic flow verification |
| Topic 4: Content Security | 15% | - Content filtering - Web filtering - Antispam filtering - Antivirus protection |
| Topic 5: Junos OS Security Objects | 20% | - Security zones - Address objects and address sets - Application objects and ALGs - Screens and security profiles |
| Topic 6: SRX Series Service Gateways | 20% | - Interfaces - Juniper vSRX Virtual Firewall - J-Web management interface - Initial configuration - General Junos architecture - Traffic flow and security processing - Hardware components |
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問題 #87
Your manager asks you to ping 192.0.2.128. The ping fails and you do not know why, so you enable a trace option on your SRX Series Firewall.
Referring to the exhibit, what is the reason for this behavior?
答案:D
解題說明:
The trace output shows the message "packet dropped, drop by firewall check" followed by "flow find session returns error", which indicates that the SRX could not find a valid route (RIB lookup failed) for the destination IP 192.0.2.128. When no route exists to the destination, the SRX drops the packet before creating a session. Therefore, the ping fails due to the absence of a known route.
問題 #88
Which two statements are true about the NextGen Web Filtering (NGWF) feature on an SRX Series device? (Choose two.)
答案:B,D
解題說明:
NextGen Web Filtering consults the Juniper cloud first to categorize and evaluate URLs in real time, ensuring up-to-date threat and content intelligence.
NextGen Web Filtering is a licensed feature and requires a valid subscription to operate on an SRX Series device.
問題 #89
Which two statements correctly describe static NAT? (Choose two.)
答案:C,D
解題說明:
Static NAT requires equal-sized internal and external address ranges to maintain one-to-one address mapping.
Static NAT does not require address pools because each internal address is permanently mapped to a specific external address.
問題 #90
Which two statements are correct about security zones? (Choose two.)
答案:B,D
解題說明:
* Option B:Correct. Interfaces in the same security zone must belong to the same routing instance; zones cannot span multiple routing instances.
* Option D:Correct. A security zone can contain multiple interfaces, allowing grouping of similar trust levels (e.g., multiple LAN subnets in a trust zone).
* Option A:Incorrect. An interface can belong to only one zone at a time.
* Option C:Incorrect. Interfaces within the same zone cannot be split across routing instances.
Correct Statements:Interfaces in the same zone must share the same routing instance, and a zone can contain multiple interfaces.
Reference:Juniper Networks -Security Zones and Routing Instances, Junos OS Security Fundamentals.
問題 #91
Which two statements are correct about unified security policies? (Choose two.)
答案:B,C
解題說明:
Unified security policies (USPs) provide integrated application-aware controls usingAppIDand extend traditional zone-based policy enforcement.
* Option A:Correct. If traffic matches a unified security policy, it is not re-evaluated by traditional security policies. Unified policies take precedence for matched flows.
* Option B:Incorrect. Traditional policies rely on Layer 3/4 attributes. Unified policies go deeper by leveraging AppID, which inspects traffic up to Layer 7.
* Option C:Incorrect. Traffic matching a traditional policy is unaffected by unified policy unless unified mode is explicitly configured for those flows.
* Option D:Correct. Dynamic application recognition in unified policies usesLayer 7 (application- layer) inspectionvia AppID.
Correct Statements:A and D
Reference:Juniper Networks -Unified Security Policies and AppSecure AppID, Junos OS Security Fundamentals.
問題 #92
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