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| Section | Objectives |
|---|---|
| Juniper SRX Platform Basics | - Junos security architecture
|
| Security Services and Monitoring | - Security services overview
|
| Security Fundamentals | - Network security concepts
|
| Security Policies and NAT | - Policy configuration
|
| VPN and Secure Connectivity | - IPsec VPN fundamentals
|
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NEW QUESTION # 78
Which two statements about global security policies are correct? (Choose two.)
Answer: A,C
Explanation:
Global security policies extend the flexibility of policy enforcement across the SRX. They are not tied to specific source and destination zones:
* From-zone and to-zone contexts are not required(Option A). Global policies apply across all zones unless restricted by match conditions.
* Global security policies do not require specific zone contexts(Option B is incorrect).
* Global policies areprocessed after zone-based policies, not before. This means that zone-based security policies take precedence (Option C is incorrect).
* Administrators can configure bothzone-based security policies and global security policies at the same timeon the same device (Option D is correct).
This allows flexible designs where specific policies can be enforced by zone, while general policies can be applied globally without duplicating rules across multiple zones.
Reference:Juniper Networks -Junos OS Security Fundamentals, Global Security Policies.
NEW QUESTION # 79
Which statement is correct about exception traffic?
Answer: D
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 # 80
When a new traffic flow enters an SRX Series device, in which order are these processes performed?
Answer: D
Explanation:
The packet flow fornew trafficon SRX is processed in a defined order:
* Screens (Option B, Step 1):Packets are first checked by screens for anomalies such as floods, malformed packets, or protocol violations.
* Route Lookup (Step 2):The destination IP is checked in the routing table to determine the egress interface.
* Zone Determination (Step 3):Once the ingress and egress interfaces are known, their associated zones are identified.
* Security Policies (Step 4):With both zones determined, the packet is evaluated against the configured security policies.
Other options list incorrect sequences, either moving routing later or placing policies before zone determination, which is not possible.
Correct Processing Order:screens # routes # zones # security policies
Reference:Juniper Networks -Packet Flow and Security Processing Order, Junos OS Security Fundamentals.
NEW QUESTION # 81
You have a situation where legitimate traffic is incorrectly identified as malicious by your screen options.
In this scenario, what should you do?
Answer: D
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 # 82
You are modifying the NAT rule order and you notice that a new NAT rule has been added to the bottom of the list.
In this situation, which command would you use to reorder NAT rules?
Answer: B
Explanation:
The insert command is used to reorder NAT rules in Junos OS. It allows you to move a rule to a specific position within the rule set, such as insert rule rule-name before rule other-rule-name.
This ensures the correct evaluation order for NAT processing.
NEW QUESTION # 83
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