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| Section | Objectives |
|---|---|
| Topic 1: Security Fundamentals | - Network security concepts
|
| Topic 2: Security Policies and NAT | - Policy configuration
|
| Topic 3: Juniper SRX Platform Basics | - Junos security architecture
|
| Topic 4: VPN and Secure Connectivity | - IPsec VPN fundamentals
|
| Topic 5: Security Services and Monitoring | - Security services overview
|
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NEW QUESTION # 63
You need to capture control plane traffic on a high-end SRX Series device.
How would you accomplish this task?
Answer: D
Explanation:
On high-end SRX platforms, control-plane (Routing Engine-destined) traffic transits the loopback (lo0) and is best captured by applying a firewall filter on lo0 with the then sample action, together with traffic sampling under forwarding-options to write packets to a file.
sample sends matched control-plane packets to the sampling process, which can record them for analysis.
datapath-debug capture focuses on data-plane/SPC paths and is not the tool for generic control-plane packet capture.
tcpdump from shell is not the supported workflow on SRX; the operational command is monitor traffic, but for high-end control-plane capture, the recommended and scalable method is lo0 filter + sampling.
Port mirroring mirrors transit data-plane traffic, not RE-destined control-plane packets.
NEW QUESTION # 64
Which statement is correct about exception traffic?
Answer: A
Explanation:
Exception traffic refers to packets that require special handling by the Routing Engine (RE) rather than being processed normally by the Packet Forwarding Engine (PFE). To protect the RE from overload, this traffic is rate-limited on the internal connection between the PFE and RE.
NEW QUESTION # 65
Click the Exhibit button.
Which type of policy is shown in the exhibit?
Answer: D
Explanation:
From the exhibit configuration:
[edit security policies from-zone Trust to-zone Trust]
policy allow-all {
match {
source-address any;
destination-address any;
application any;
}
then {
permit;
}
}
* Thefrom-zoneandto-zoneare both set toTrust # Trust.
* This means the policy is governing trafficwithin the same zone.
* Policies within the same zone are calledintra-zone policies.
Analysis of options:
* Global policy (A):Applied universally across zones, not zone-specific. Not the case here.
* Inter-zone policy (B):Applies between twodifferentzones (e.g., Trust # Untrust). Not the case here since both zones are Trust.
* Intra-zone policy (C):Correct. Applies to traffic within the same zone (Trust # Trust).
* Default policy (D):The implicit deny-all policy that applies when no policy matches. Not shown in this exhibit.
Correct Policy Type:Intra-zone policy
Reference:Juniper Networks -Security Policy Types (Inter-zone, Intra-zone, and Global), Junos OS Security Fundamentals.
NEW QUESTION # 66
Which two statements are correct about screens? (Choose two.)
Answer: A,D
Explanation:
Screens are attack detection and prevention mechanisms applied to SRX security zones. Juniper documentation explains that predefined screen options can be enabled for each security zone to detect and block traffic considered harmful. Because a screen profile is a reusable configuration object, the same screen can be referenced by more than one security zone, making option A correct. Screens are evaluated on traffic entering the firewall through an interface bound to a zone, so the screen is applied based on the ingress security zone, making option D correct. Option B is incorrect because screens are not described simply as "first path only"; they are zone-based protection mechanisms applied to incoming traffic. Option C is also incorrect because screen options include IP, ICMP, TCP, UDP, flood, and reconnaissance protections.
NEW QUESTION # 67
When does screening occur in the flow module?
Answer: B
Explanation:
In Juniper SRX flow-based packet processing, the flow module is 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, the session lookup occurs. 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 through route lookup, NAT processing, and security policy evaluation before 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.
NEW QUESTION # 68
......
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