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| Section | Objectives |
|---|---|
| Topic 1: Junos OS Security Objects | - Zones - Addresses - Screens - Applications and Application Layer Gateways (ALGs) |
| Topic 2: Monitoring and Troubleshooting | - Troubleshooting security policies - Monitoring the packet flow process - Validating behaviors |
| Topic 3: SRX Series Service Gateways | - Initial configuration - Juniper vSRX Virtual Firewall - Interfaces - General Junos architecture - Hardware - J-Web - Traffic flow/security processing |
| Topic 4: Network Address Translation | - Destination NAT - Source NAT - Static NAT |
| Topic 5: Content Security | - Antivirus - Content filtering - Antispam - Web filtering |
| Topic 6: Security Policies | - Global policies - Zone-based policies - Unified security policies |
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NEW QUESTION # 29
Which statement is correct about exception traffic?
Answer: A
Explanation:
Exception traffic refers to traffic that must be sent from thePacket Forwarding Engine (PFE) to the Routing Engine (RE)for processing, such as routing protocol updates, management traffic, and control-plane destined packets.
* Option B:Correct. Exception traffic is rate-limited on the internal connection between the PFE and RE to protect the Routing Engine from denial-of-service attacks.
* Option A:Incorrect. Exception traffic is not handled only on the PFE; it requires RE involvement.
* Option C:Incorrect. Rejected traffic by security policies is simply dropped, not classified as exception traffic.
* Option D:Incorrect. Malformed packets are dropped, not considered exception traffic.
Correct Statement:Exception traffic is rate-limited between the PFE and RE.
Reference:Juniper Networks -Exception Traffic and RE Protection, Junos OS Security Fundamentals.
NEW QUESTION # 30
What is the purpose of assigning logical interfaces to separate security zones in Junos OS?
Answer: C
Explanation:
In Junos OS, security zones are the foundation of SRX firewall policy enforcement. Logical interfaces must be assigned to zones. This enables:
* Separation of traffic by zone boundaries.
* Enforcement ofsecurity policiesfor traffic traversing between zones.
* Control of traffic across VLANs, subnets, or functional areas (e.g., trust, untrust, DMZ).
Other options:
* Zone assignment is not used to simplify interface configuration (A).
* Routing protocols and updates (B) are handled by routing instances, not zones.
* SNMP monitoring (D) is enabled under system or services configuration, not zones.
Reference:Juniper Networks -Security Zones and Policy Enforcement, Junos OS Security Fundamentals.
NEW QUESTION # 31
You want to verify that your NextGen Web Filtering (NGWF) feature is connected to the Juniper cloud.
Which operational mode command would you use for this task?
Answer: B
Explanation:
The show security web filtering status command displays the connection status between the SRX device's NextGen Web Filtering (NGWF) feature and the Juniper Cloud. It verifies that the SRX is properly communicating with the cloud service for URL categorization and policy enforcement.
NEW QUESTION # 32
You are not able to ping an interface on an SRX Series Firewall.
Which two actions should you take to solve this issue? (Choose two.)
Answer: A,D
Explanation:
For an SRX firewall interface to respond to management traffic such as ICMP pings:
The interface must be assigned to a security zone (Option A). If an interface is not part of any zone, it is placed into the null zone, which drops all traffic.
Additionally, the zone must be configured to allow management traffic types as host-inbound-traffic (Option D). For ICMP, the protocol must be explicitly allowed under host-inbound-traffic for that zone.
Other options:
Security policies (Option B) control traffic traversing the firewall, not traffic destined to the SRX device itself.
Assigning the interface to the null zone (Option C) prevents any communication, including management.
Correct Actions: Assign the interface to a zone and configure ICMP under host-inbound-traffic.
NEW QUESTION # 33
You have a situation where legitimate traffic is incorrectly identified as malicious by your screen options.
In this scenario, what should you do?
Answer: A
Explanation:
Screen options are used to detect and prevent attacks such as floods, scans, and malformed packets. In some cases,false positivesmay occur, where legitimate traffic is mistakenly identified as malicious.
* To address this, administrators can configure thealarm-without-dropoption (Option D). This setting generates alarms/logs for suspicious traffic without actually dropping it, allowing verification before taking further action.
* Enabling all screen options (Option A) may increase false positives further.
* Discarding traffic immediately (Option B) risks disrupting legitimate communication.
* Increasing sensitivity (Option C) worsens the problem, since false positives would increase.
Correct Action:Use alarm-without-drop to log the traffic without dropping it.
Reference:Juniper Networks -Junos OS Screen Options and Troubleshooting, Junos OS Security Fundamentals.
NEW QUESTION # 34
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