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| Section | Objectives |
|---|---|
| Security Policies and NAT | - Policy configuration
|
| Security Fundamentals | - Network security concepts
|
| Security Services and Monitoring | - Security services overview
|
| VPN and Secure Connectivity | - IPsec VPN fundamentals
|
| Juniper SRX Platform Basics | - Junos security architecture
|
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NEW QUESTION # 56
Referring to the exhibit, which two statements are correct? (Choose two.)
Answer: A,D
Explanation:
The policy is defined from Trust zone to Untrust zone, which makes it a zone-based security policy.
The application junos-https with destination port 443 and action permit confirms that HTTPS traffic is explicitly allowed.
NEW QUESTION # 57
Which two statements about SRX Series zones are correct? (Choose two.)
Answer: A,B
Explanation:
* Intra-zone traffic:On SRX devices, traffic between interfaces in the same security zone is allowed without requiring a security policy(Option C is correct). Policies are only evaluated for inter-zone traffic.
* Junos-host functional zone:This zone is a predefined functional zone that allows administrators to apply policies controlling access to the SRX firewall itself, such as SSH, HTTP, or SNMP traffic (Option D is correct).
* Null zone:This zone is a predefined discard zone. Interfaces placed in the null zone drop all traffic. It does not allow policy logging of dropped control plane traffic (Option A is incorrect).
* Management functional zone:This is used to define management interfaces, not the "functional zone" as stated in Option B (incorrect wording).
Correct Statements:C and D
Reference:Juniper Networks -Security Zones and Functional Zones, Junos OS Security Fundamentals.
NEW QUESTION # 58
Referring to the exhibit, which type of NAT is the SRX Series Firewall performing?
Answer: B
Explanation:
The exhibit shows an internal source address and port being translated to a different external source address and port. This behavior identifies source NAT with Port Address Translation. Source NAT changes the source IP address of traffic leaving the SRX, commonly allowing private hosts to access public networks. PAT extends this by translating the source port as well, allowing multiple internal devices or sessions to share a smaller number of public addresses, often a single public IP address. The exhibit does not show destination NAT because the translated value is associated with the internal client's source identity, not the destination server address. It is not source NAT without PAT because the port number is also changed. Therefore, source NAT with PAT is the correct answer.
NEW QUESTION # 59
Click the Exhibit button.
You must ensure that sessions can only be established from the external device.
Referring to the exhibit, which type of NAT is being performed?
Answer: B
Explanation:
From the exhibit:
The internal host (172.25.11.101) is located in the Trust zone.
The external address (203.0.113.199/30) is used for communication with the ISP.
The requirement is that sessions can only be initiated from the external device (the ISP or untrust side) toward the internal host.
This requirement matches the behavior of Destination NAT:
Destination NAT only (Option A): Maps the external/public IP (203.0.113.199) to the internal/private IP (172.25.11.101). This allows inbound connections to be translated and sent to the internal host. The internal host cannot initiate outbound sessions, since the translation only applies to inbound traffic.
Source NAT only (Option B): Used for outbound sessions from internal private IPs to the Internet. This does not meet the requirement.
Static PAT (Option C): Maps a single port of a public IP to a private IP/port. The exhibit does not indicate a port-based translation.
Static NAT and source NAT (Option D): Would provide bidirectional communication, allowing sessions to be initiated in both directions. This contradicts the requirement.
Correct NAT Type: Destination NAT only
NEW QUESTION # 60
Click the Exhibit button.
You must ensure that sessions can only be established from the external device.
Referring to the exhibit, which type of NAT is being performed?
Answer: B
Explanation:
From the exhibit:
* The internal host (172.25.11.101) is located in theTrust zone.
* The external address (203.0.113.199/30) is used for communication with the ISP.
* The requirement is thatsessions can only be initiated from the external device(the ISP or untrust side) toward the internal host.
This requirement matches the behavior ofDestination NAT:
* Destination NAT only (Option A):Maps the external/public IP (203.0.113.199) to the internal/private IP (172.25.11.101). This allows inbound connections to be translated and sent to the internal host. The internal host cannot initiate outbound sessions, since the translation only applies to inbound traffic.
* Source NAT only (Option B):Used for outbound sessions from internal private IPs to the Internet.
This does not meet the requirement.
* Static PAT (Option C):Maps a single port of a public IP to a private IP/port. The exhibit does not indicate a port-based translation.
* Static NAT and source NAT (Option D):Would provide bidirectional communication, allowing sessions to be initiated in both directions. This contradicts the requirement.
Correct NAT Type:Destination NAT only
Reference:Juniper Networks -NAT Types (Source NAT, Destination NAT, Static NAT), Junos OS Security Fundamentals.
NEW QUESTION # 61
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