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| Section | Objectives |
|---|---|
| Security Fundamentals | - Network security concepts
|
| Security Services and Monitoring | - Security services overview
|
| VPN and Secure Connectivity | - IPsec VPN fundamentals
|
| Security Policies and NAT | - Policy configuration
|
| Juniper SRX Platform Basics | - Junos security architecture
|
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NEW QUESTION # 42
Which statement is correct about source NAT?
Answer: D
Explanation:
Source NAT (Network Address Translation) is used on SRX devices to allow hosts with private IP addresses to access external networks, such as the Internet. The SRX translates theprivate IP address of the source host into a public IP addressbefore forwarding traffic toward the destination.
* It does not translate MAC addresses (Option A).
* NAT is unidirectional in this case: it specifically translates private-to-public in the outbound direction, while the reverse (return traffic) is handled automatically through the session table. It is not a bidirectional translation (Option C).
* NAT processing occurs as part of the flow module, not limited only to ingress traffic (Option D).
Therefore, the correct statement is that source NAT translatesprivate IP addresses to public IP addresses.
Reference:Juniper Networks -Junos OS Security Fundamentals, NAT Concepts and Source NAT Processing.
NEW QUESTION # 43
Click the Exhibit button.
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: A,B
Explanation:
Juniper SRX evaluatessecurity policiessequentially from top to bottom. Once a policy match is found, no further policies are evaluated. In this exhibit:
* First Policy (FTP, deny):
* Source: 172.25.11.0/24
* Destination: 10.1.0.0/16
* Application: FTP
* Action: deny#Any FTP traffic from 172.25.11.0/24 to 10.1.0.0/16 isdenied.
* Second Policy (SSH, permit):
* Same source/destination but application = SSH
* Action = permit#SSH traffic from 172.25.11.0/24 to 10.1.0.0/16 ispermitted.
* Third Policy (HTTPS, permit):#HTTPS from the same source/destination ispermitted.
* Fourth Policy (Ping, permit):
* Source: 172.25.11.0/24 to any destination
* Application: ping
* Action: permit#ICMP echo requests (ping) from 172.25.11.0/24 to any destination arepermitted.
* Fifth Policy (any # any, deny):#Serves as a defaultdeny allat the end.
Now checking each option:
* Option A:SSH from 172.25.11.10 # 10.1.0.10 matches theSSH permit rule(second policy).#Correct.
* Option B:Ping from 172.25.11.100 # 10.1.0.10 matches theping permit rule(fourth policy). This traffic is permitted, not denied.#Incorrect.
* Option C:FTP from 10.1.0.10 # 172.25.11.100 isreverse traffic (untrust to trust). The table applies onlytrust # untrust, so this policy does not apply.#Incorrect.
* Option D:FTP from 172.25.11.11 # 10.1.0.10 matches the first policy (FTP deny rule).#Correct.
Correct Statements:A, D
Reference:Juniper Networks -Security Policies Evaluation Order, Junos OS Security Fundamentals, Official Course Guide.
NEW QUESTION # 44
Which two statements are correct about security zones on an SRX Series device? (Choose two.)
Answer: B,D
Explanation:
Security zones cannot be shared between routing instances-each routing instance maintains its own separate set of zones.
Both intrazone (within the same zone) and interzone (between zones) traffic are controlled by security policies, which determine whether traffic is permitted or denied.
NEW QUESTION # 45
On the SRX Series Firewalls, which type of NAT is bi-directional?
Answer: A
Explanation:
Static NAT is bi-directional on SRX Series Firewalls. It creates a one-to-one mapping between internal and external IP addresses, allowing traffic to flow both from inside to outside and from outside to inside using the same translation.
NEW QUESTION # 46
You want to use Avira Antivirus.
Which two actions should you perform to satisfy this requirement? (Choose two.)
Answer: A,D
Explanation:
Avira Antivirus requires a system reboot so that the antivirus engine components are properly loaded and initialized on the SRX Series device.
The Avira engine must be enabled in configuration mode to activate antivirus scanning functionality within the Junos OS security services framework.
NEW QUESTION # 47
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