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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Address Translation | 15% | - Source NAT - Destination NAT - Static NAT - NAT pools and rules |
| Topic 2: Security Policies | 20% | - Zone-based policies - Policy rules and actions - Unified security policies - Global policies |
| Topic 3: Junos OS Security Objects | 20% | - Screens and security profiles - Security zones - Application objects and ALGs - Address objects and address sets |
| Topic 4: SRX Series Service Gateways | 20% | - General Junos architecture - Hardware components - Juniper vSRX Virtual Firewall - J-Web management interface - Traffic flow and security processing - Initial configuration - Interfaces |
| Topic 5: Content Security | 15% | - Web filtering - Content filtering - Antispam filtering - Antivirus protection |
| Topic 6: Monitoring, Reporting and Troubleshooting | 10% | - Troubleshooting common issues - Log and event management - Security policy monitoring - Traffic flow verification |
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NEW QUESTION # 90
When does screening occur in the flow module?
Answer: A
Explanation:
In Juniper SRX flow-based packet processing, theflow moduleis responsible for security functions such as screening, session management, NAT, and policy enforcement. The processing order is critical:
* Screens are applied before any session lookup.This ensures that packets are inspected for anomalies, floods, or protocol violations before consuming resources for session management. Examples of these screens include TCP SYN flood protection, ICMP flood protection, and port scanning protection.
* After screening, thesession lookupoccurs. At this point, the firewall checks whether the packet belongs to an existing session in the session table. If a matching session is found, the packet bypasses policy evaluation and is forwarded according to the session state.
* If no existing session is found, the packet continues throughroute lookup, NAT processing, and security policy evaluationbefore a new session is created.
Thus,screening occurs before the session lookup, protecting the system early in the flow process. This design ensures efficiency by dropping malicious or malformed traffic before allocating session resources.
Reference:Juniper Networks -SRX Series Services Gateways Security Processing (Flow Module Sequence), Junos OS Security Fundamentals, Official Course Guide.
NEW QUESTION # 91
Which two statements about Juniper NextGen Web Filtering are correct? (Choose two.)
Answer: C,D
Explanation:
Juniper NextGen Web Filtering provides URL category and reputation-based control for HTTP and HTTPS traffic. Juniper documentation states that URL categories are available in the Juniper NGWF cloud and that NGWF supports categorization and recategorization functions. The recategorization process is performed using operational mode commands such as request security utm web-filtering recategorize url and related status commands, not by editing normal Junos configuration statements. Therefore, option B is correct. Option C is also correct because NGWF uses predefined Juniper NextGen URL categories. Option A is incorrect because recategorization is not performed as a standard configuration object change. Option D is incorrect because Juniper also supports custom URL category mechanisms for local web filtering use cases.
NEW QUESTION # 92
A new packet arrives on an interface on your SRX Series Firewall that is assigned to the trust security zone.
In this scenario, how does the SRX Series Firewall determine the egress security zone?
Answer: B
Explanation:
When a new packet arrives that does not match an existing session, the SRX performs full flow-based processing. After ingress zone determination, the firewall must know the destination zone to evaluate security policies.
* The SRX determines theegress zone by performing a route lookupon the packet's destination IP address.
* The routing decision identifies the outgoing interface, and the zone associated with that interface becomes theegress zone.
* Session lookup (Option A) happens first but is only useful for existing sessions.
* Destination port (Option B) is used for application identification, not zone determination.
* Ingress zone properties (Option D) cannot determine the egress zone.
Reference:Juniper Networks -SRX Series Flow Processing and Security Zone Determination, Junos OS Security Fundamentals.
NEW QUESTION # 93
Which statement is correct about capturing transit packets on an SRX Series Firewall?
Answer: A
Explanation:
Transit traffic is defined as traffic that passes through the SRX (not destined to the Routing Engine). To capture transit traffic:
Sampling and port mirroring (Option D) are the correct supported methods for capturing or exporting transit traffic. Sampling allows captured packets to be sent to a file or collector, while port mirroring sends a copy to a monitoring interface.
Option A: Firewall filters on an egress interface cannot directly capture packets; they can only count, accept, discard, or sample. Sampling itself is separate.
Option B: Loopback interface (lo0) is for control-plane traffic, not transit traffic.
Option C: tcpdump is not supported on SRX as a tool for capturing transit packets; the operational command monitor traffic interface is used, but sampling/port mirroring is the recommended scalable approach.
Correct Method: Sampling and port mirroring
NEW QUESTION # 94
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.)
Answer: B,C
Explanation:
FTP traffic from 172.25.11.0/24 to 10.1.0.0/16 matches the explicit FTP deny rule, so a session from 172.25.11.11 to 10.1.0.10 is denied.
SSH traffic from 172.25.11.0/24 to 10.1.0.0/16 matches the explicit SSH permit rule, so a session from 172.25.11.10 to 10.1.0.10 is permitted.
NEW QUESTION # 95
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