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| Section | Objectives |
|---|---|
| Network Address Translation | - Source NAT - Static NAT - Destination NAT |
| Junos OS Security Objects | - Zones - Addresses - Applications and Application Layer Gateways (ALGs) - Screens |
| Security Policies | - Global policies - Zone-based policies - Unified security policies |
| Content Security | - Antivirus - Web filtering - Content filtering - Antispam |
| SRX Series Service Gateways | - J-Web - Interfaces - Traffic flow/security processing - Initial configuration - Juniper vSRX Virtual Firewall - Hardware - General Junos architecture |
| Monitoring and Troubleshooting | - Troubleshooting security policies - Monitoring the packet flow process - Validating behaviors |
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NEW QUESTION # 12
Referring to the exhibit, the top table shows the source and destination IP addresses and also the source and destination ports of the incoming packet. The lower table represents the security policies from the trust zone to the untrust zone.
In this scenario, which two statements are correct? (Choose two.)
Answer: A,D
Explanation:
The packet's destination port is 80 (HTTP), which does not match any specific application policy in the table. As a result, it proceeds to the final policy, which denies all unmatched traffic (any any any deny).
Junos SRX evaluates security policies sequentially from top to bottom until a match is found.
Since no earlier policy matches HTTP traffic, the firewall enforces the final deny rule.
NEW QUESTION # 13
When traffic enters an interface, which two results does a route lookup determine? (Choose two.)
Answer: B,C
Explanation:
When a packet enters an SRX interface, aroute lookupis performed:
* It determines theegress interface(Option B) by checking the destination IP against the routing table.
* Once the egress interface is known, its associatedegress security zone(Option D) is also determined.
* Theingress interface (Option A)is already known when the packet arrives, so the route lookup does not determine it.
* DNS name (Option C):DNS is unrelated to routing lookups.
Correct Results:egress interface, egress security zone
Reference:Juniper Networks -Packet Flow and Route Lookup, Junos OS Security Fundamentals.
NEW QUESTION # 14
You are asked to permit users to read Reddit posts but prevent them from posting any new content.
Which two actions would you perform to achieve this task? (Choose two.)
Answer: B,D
Explanation:
To control specific application behaviors (like allowing Reddit reads but blocking posts), you must include micro-application objects in unified security policies, since only unified policies support granular AppID-based control.
You must enable micro-application services for application identification so the SRX can recognize and classify sub-functions within an application, such as "read" versus "post" actions on Reddit.
NEW QUESTION # 15
Which two statements are correct about security policies in SRX Series Firewalls? (Choose two.)
Answer: A,D
Explanation:
In the JNCIA-SEC SRX security policy context, standard security policies control transit traffic passing through the firewall. They are not the normal mechanism for permitting management or protocol traffic destined to the SRX itself; that type of self or exception traffic is controlled with host-inbound-traffic settings. Security policies can be configured between different zones, which is inter-zone policy, or within the same zone, which is intra-zone policy. Therefore, option C is correct because policies can apply to both intra-zone and inter-zone flows. Option D is correct in the standard SRX policy model because security policies are used to control traffic transiting the firewall. Options A and B are not correct for this topic scope.
NEW QUESTION # 16
Which security policy action will cause traffic to drop and a message to be sent to the source?
Answer: B
Explanation:
Security policies on SRX support several actions:
* Permit:Allows traffic to pass according to the rule.
* Deny:Silently drops the traffic without notifying the source.
* Reject:Drops the trafficand sends a TCP RST (for TCP) or ICMP unreachable (for UDP/other protocols)back to the source. This provides feedback to the sending host.
* Next-policy:Allows policy chaining to evaluate the next policy set.
Therefore, the action that causes traffic to drop and a message to be sent to the source isreject.
Reference:Juniper Networks -Security Policy Actions, Junos OS Security Fundamentals.
NEW QUESTION # 17
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