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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Policies | 20% | - Zone-based policies - Policy rules and actions - Unified security policies - Global policies |
| Topic 2: Network Address Translation | 15% | - NAT pools and rules - Static NAT - Source NAT - Destination NAT |
| Topic 3: Content Security | 15% | - Antispam filtering - Content filtering - Antivirus protection - Web filtering |
| Topic 4: SRX Series Service Gateways | 20% | - Traffic flow and security processing - Hardware components - Juniper vSRX Virtual Firewall - J-Web management interface - General Junos architecture - Interfaces - Initial configuration |
| Topic 5: Junos OS Security Objects | 20% | - Application objects and ALGs - Screens and security profiles - Security zones - Address objects and address sets |
| Topic 6: Monitoring, Reporting and Troubleshooting | 10% | - Log and event management - Traffic flow verification - Security policy monitoring - Troubleshooting common issues |
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15. Frage
Which statement is correct about source NAT?
Antwort: B
Begründung:
Source NAT (Network Address Translation) is used on SRX devices to allow hosts with private IP addresses to access external networks, such as the Internet. The SRX translates the private IP address of the source host into a public IP address before forwarding traffic toward the destination.
It does not translate MAC addresses (Option A).
NAT is unidirectional in this case: it specifically translates private-to-public in the outbound direction, while the reverse (return traffic) is handled automatically through the session table. It is not a bidirectional translation (Option C).
NAT processing occurs as part of the flow module, not limited only to ingress traffic (Option D).
Therefore, the correct statement is that source NAT translates private IP addresses to public IP addresses.
16. Frage
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: A,B
Begründung:
The policy table applies to traffic from the Trust zone to the Untrust zone. The source prefix 172.25.11.0/24 and destination prefix 10.1.0.0/16 are matched for FTP, SSH, HTTPS, and ping actions. FTP traffic from 172.25.11.11 to 10.1.0.10 matches the FTP deny policy, so option A is correct. SSH traffic from 172.25.11.10 to 10.1.0.10 matches the SSH permit policy, so option C is correct. Ping from 172.25.11.100 to 10.1.0.10 is permitted, not denied, because the ping policy permits it. Option D reverses the source and destination direction and does not match the displayed Trust-to-Untrust policy table. Security policies are matched using zone context, source address, destination address, and application.
17. Frage
You want to enable NextGen Web Filtering (NGWF) on your SRX Series Firewall.
Which two actions must you perform in this scenario? (Choose two.)
Antwort: A,B
Begründung:
To enable Juniper NextGen Web Filtering, the SRX must have the required NGWF license and the web-filtering type must be configured for NGWF. Juniper documentation states that Enhanced Web Filtering and NGWF require separate licenses and that NGWF can use the wf_key_ng_juniper license key. Juniper also documents NGWF as a configurable web-filtering type, including ng-juniper, and notes that administrators can confirm missing license conditions using the web-filtering status command. A public IP address on the loopback interface is not a general NGWF requirement. SSL host inbound traffic on the untrust zone is also not required for enabling NGWF; SSL proxy or SNI behavior may affect HTTPS inspection, but it is not the base enablement step.
18. Frage
Which statement about the flow module is correct in the context of destination NAT?
Antwort: C
Begründung:
In SRX flow-based processing, the first packet of a new session goes through first path processing, where NAT rule lookup, route lookup, security policy evaluation, and session creation occur. Destination NAT is performed before security policy evaluation, so the translated destination address is used when matching the policy. After the session is created, later packets use fast path processing and follow the cached session information, including the NAT translation state created for the session. Therefore, the flow module is involved with NAT behavior in both first path and fast path processing. Option B is incorrect because destination NAT changes destination addresses, not only source addresses. Options C and D are incomplete because NAT lookup and session installation occur during first path, while established NAT translations are applied during fast path.
19. Frage
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?
Antwort: A
Begründung:
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.
20. Frage
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