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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Policies | 20% | - Policy rules and actions - Global policies - Unified security policies - Zone-based policies |
| Topic 2: SRX Series Service Gateways | 20% | - General Junos architecture - Interfaces - Initial configuration - J-Web management interface - Traffic flow and security processing - Hardware components - Juniper vSRX Virtual Firewall |
| Topic 3: Monitoring, Reporting and Troubleshooting | 10% | - Traffic flow verification - Troubleshooting common issues - Log and event management - Security policy monitoring |
| Topic 4: Junos OS Security Objects | 20% | - Screens and security profiles - Security zones - Address objects and address sets - Application objects and ALGs |
| Topic 5: Network Address Translation | 15% | - Destination NAT - Static NAT - Source NAT - NAT pools and rules |
| Topic 6: Content Security | 15% | - Web filtering - Antispam filtering - Antivirus protection - Content filtering |
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68. Frage
You are asked to reduce security configuration complexity on your external facing firewalls. You notice that a previous administrator included hundreds of private subnet NAT rules covering various RFC1918 addresses. You want to replace all these rules with a single rule covering all RFC1918 addresses.
Which rule would you use in this scenario?
Antwort: A
Begründung:
RFC 1918 defines three private IPv4 blocks:
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
Option A exactly matches these ranges in a single source NAT rule, replacing numerous per-subnet entries.
Options B and C contain invalid/non-RFC1918 networks (e.g., 192.16.0.0/12, 172.168.0.0/16).
Option D incorrectly adds documentation network 192.0.2.0/24, which is not RFC1918.
69. Frage
You want to use Avira Antivirus.
Which two actions should you perform to satisfy this requirement? (Choose two.)
Antwort: B,C
Begründung:
Avira Antivirus requires a system reboot so that the antivirus engine components are properly loaded and initialized on the SRX Series device.
The Avira engine must be enabled in configuration mode to activate antivirus scanning functionality within the Junos OS security services framework.
70. Frage
What are two ways that an SRX Series device identifies content? (Choose two.)
Antwort: A,B
Begründung:
SRX Series devices providecontent securityfeatures that rely on advanced identification mechanisms. File identification is not based merely on file extensions (which can be easily spoofed), but instead ondeep inspection techniques:
* AppID (Application Identification):AppID is part of the AppSecure suite, allowing the device to classify applications and content regardless of port or protocol. This enables the SRX to detect applications and their related content for enforcement.
* Protocol-based file type identification:The SRX can recognize and identify file types embedded withinHTTP, FTP, and e-mail (SMTP, IMAP, POP3) protocols. This providesaccurate content inspection and filtering, independent of file naming conventions.
* Why not the others?
* File extensions (Option A) are not reliable for content security, so SRX does not use them.
* ALGs (Option D) are used for protocol handling, such as SIP or FTP control channels, not for content identification.
Reference:Juniper Networks -Content Security and AppSecure Overview, Junos OS Security Fundamentals, Official Course Guide.
71. Frage
Which Web filtering solution uses a direct Internet-based service for URL categorization?
Antwort: B
Begründung:
Juniper Enhanced Web Filtering is a web filtering solution that uses a direct Internet-based service for URL categorization. This service allows Enhanced Web Filtering to quickly and accurately categorize URLs and other web content, providing real-time protection against malicious content. Additionally, Enhanced Web Filtering is able to provide detailed reporting on web usage, as well as the ability to define and enforce acceptable use policies.
72. Frage
Click the Exhibit button.
The exhibit shows a table representing security policies from the trust zone to the untrust zone.
In this scenario, which two statements are correct? (Choose two.)
Antwort: B,C
Begründung:
Juniper SRX evaluates security policies sequentially from top to bottom. Once a policy match is found, no further policies are evaluated. In this exhibit:
First Policy (FTP, deny):
Source: 172.25.11.0/24
Destination: 10.1.0.0/16
Application: FTP
Action: deny
⇒ Any FTP traffic from 172.25.11.0/24 to 10.1.0.0/16 is denied.
Second Policy (SSH, permit):
Same source/destination but application = SSH
Action = permit
⇒ SSH traffic from 172.25.11.0/24 to 10.1.0.0/16 is permitted.
Third Policy (HTTPS, permit):
⇒ HTTPS from the same source/destination is permitted.
Fourth Policy (Ping, permit):
Source: 172.25.11.0/24 to any destination
Application: ping
Action: permit
⇒ ICMP echo requests (ping) from 172.25.11.0/24 to any destination are permitted.
Fifth Policy (any → any, deny):
⇒ Serves as a default deny all at the end.
Now checking each option:
Option A: SSH from 172.25.11.10 → 10.1.0.10 matches the SSH permit rule (second policy). ✅ Correct.
Option B: Ping from 172.25.11.100 → 10.1.0.10 matches the ping permit rule (fourth policy). This traffic is permitted, not denied. ❌ Incorrect.
Option C: FTP from 10.1.0.10 → 172.25.11.100 is reverse traffic (untrust to trust). The table applies only trust → untrust, so this policy does not apply. ❌ Incorrect.
Option D: FTP from 172.25.11.11 → 10.1.0.10 matches the first policy (FTP deny rule). ✅ Correct.
Correct Statements: A, D
73. Frage
......
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