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Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q77-Q82):

NEW QUESTION # 77
Exhibit

You are implementing filter-based forwarding to send traffic from the 172.25.0.0/24 network through ISP-
1 while sending all other traffic through your connection to ISP-2. Your ge-0/0/1 interface connects to two networks, including the 172.25.0.0/24 network. You have implemented the configuration shown in the exhibit. The traffic from the 172.25.0.0/24 network is being forwarded as expected to 172.20.0.2, however traffic from the other network (172.25.1.0/24) is not being forwarded to the upstream 172.21.0.2 neighbor.
In this scenario, which action will solve this problem?

A. You must specify that the 172.25.1.1/24 IP address is the primary address on the ge-0/0/1 interface.
B. You must add another term to the firewall filter to accept the traffic from the 172.25.1.0/24 network.
C. You must apply the firewall filter to the lo0 interface when using filter-based forwarding.
D. You must create the static default route to neighbor 172.21 0.2 under the ISP-1 routing instance hierarchy.

Answer: D

NEW QUESTION # 78
You have deployed an SRX Series device at your network edge to secure Internet-bound sessions for your local hosts using source NAT. You want to ensure that your users are able to interact with applications on the Internet that require more than one TCP session for the same application session.
Which two features would satisfy this requirement? (Choose two.)

A. double NAT
B. STUN
C. persistent NAT
D. address persistence

Answer: C,D

Explanation:
Address persistence ensures that the same NAT IP address is used for all sessions originating from a single source IP. Persistent NAT maintains connections for applications needing multiple sessions, like VoIP.
Additional details are available in Juniper NAT Documentation.
For applications that require multiple TCP sessions for the same application session (such as VoIP or certain online games), the SRX device needs to handle NAT properly to maintain session continuity. Here's what helps:
* Address Persistence (Answer A): Address persistence ensures that multiple sessions initiated by the same internal host are mapped to the same external IP address. This is crucial for applications that use multiple TCP sessions to maintain a stateful connection with the external server.
Command Example:
bash
Copy code
set security nat source persistent-nat address-persistence
* Persistent NAT (Answer C): This feature allows the external server to initiate new connections to the internal client using the same NAT translation. It's essential for applications that require consistent NAT mappings across multiple sessions.
Command Example:
bash
Copy code
set security nat source persistent-nat permit target-host-port
These features ensure that applications with multiple TCP sessions work seamlessly across NAT.

NEW QUESTION # 79
You are asked to select a product offered by Juniper Networks that can collect and assimilate data from all probes and determine the optimal links for different applications to maximize the full potential of AppQoE.
Which product provides this capability?

A. Network Director
B. Security Director
C. Security Director Insights
D. Mist

Answer: C

Explanation:
Juniper Networks'Security Director Insightsis the product that provides advanced visibility and analytics by collecting and assimilating data from various probes and sources. Security DirectorInsights is an extension of Security Directorbut focuses on delivering actionable insights into application quality of experience (AppQoE) and security posture. It can process large amounts of data from probes to optimize traffic routing for applications.
* Security Director Insightsanalyzes traffic patterns and makes recommendations for optimal path selection to improve application performance. It integrates with other components likeAppQoEto ensure that the best links are selected for each application, improving both performance and security.
Juniper References:
* Juniper Security Director Insights: Details the role of Security Director Insights in optimizing AppQoE by leveraging traffic analysis and probe data.

NEW QUESTION # 80
You are deploying IPsec VPNs to securely connect several enterprise sites with ospf for dynamic routing. Some of these sites are secured by third-party devices not running Junos.
Which two statements are true for this deployment? (Choose two.)

A. OSPF over IPsec can be used for intersite dynamic routing.
B. Sites with overlapping address spaces cannot be supported.
C. Sites with overlapping address spaces can be supported.
D. OSPF over GRE over IPsec is required to enable intersite dynamic routing

Answer: C,D

Explanation:
Understanding the Scenario:
* Objective: Deploy IPsec VPNs connecting multiple enterprise sites using OSPF for dynamic routing.
* Challenge: Some sites use third-party devices not running Junos OS.
* Considerations:
* Compatibility between Juniper and third-party devices.
* Support for dynamic routing protocols (OSPF) over IPsec VPNs.
* Handling overlapping IP address spaces.
Option Analysis:
Option A: OSPF over IPsec can be used for intersite dynamic routing.
* Explanation:
* OSPF Characteristics:
* OSPF uses multicast addresses (224.0.0.5 and 224.0.0.6) for neighbor discovery and routing updates.
* IPsec Limitations:
* Standard IPsec tunnel mode does not support multicast traffic natively.
* Multicast traffic cannot traverse IPsec tunnels unless encapsulated.
* Juniper Solution:
* Juniper devices can use routed VPNs (route-based VPNs) with st0 interfaces, allowing OSPF over IPsec.
* However, this requires support from both ends of the VPN tunnel.
* Third-Party Devices:
* May not support OSPF over IPsec without additional configurations.
* Conclusion:
* Option A is not universally true in this scenario due to third-party device limitations.

NEW QUESTION # 81
Which two statements about transparent mode and Ethernet switching mode on an SRX series device are correct.

A. In Ethernet switching mode, Layer 2 interfaces must be placed in a security zone.
B. In transparent mode, IRB interfaces must be placed in a security zone.
C. In transparent mode, Layer 2 interfaces must be placed in a security zone.
D. In Ethernet switching mode, IRB interfaces must be placed in a security zone.

Answer: C,D

NEW QUESTION # 82
......

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