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Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q78-Q83):

NEW QUESTION # 78
Which three statements about persistent NAT are correct? (Choose Three)

A. Persistent NAT only applies to source NAT.
B. All requests from an internal address are mapped to the same reflexive address.
C. New sessions can be initiated from a destination towards the reflexive address.
D. Persistent NAT applies to both destination and source NAT.
E. New sessions can only be initiated from a source towards the reflexive address.

Answer: A,B,C

NEW QUESTION # 79
You configured two SRX series devices in an active/passive multimode HA setup.
In this scenario, which statement is correct?

A. Both devices start in the undiscovered state until the activeness determination process is completed.
B. Both devices are in the active state until the activeness determine determination process is completed.
C. Both devices are in the passive state until the activeness determination process is completed.
D. Both devices start in a hold state until the activeness determination process is completed.

Answer: B

NEW QUESTION # 80
Exhibit

You have recently configured Adaptive Threat Profiling and notice 20 IP address entries in the monitoring section of the Juniper ATP Cloud portal that do not match the number of entries locally on the SRX Series device, as shown in the exhibit.
What is the correct action to solve this problem on the SRX device?

A. Flush the DNS cache on the SRX device.
B. You must configure the DAE in a security policy on the SRX device.
C. Refresh the feed in ATP Cloud.
D. Force a manual download of the Proxy__Nodes feed.

Answer: A

NEW QUESTION # 81
You are asked to establish IBGP between two nodes, but the session is not established. To troubleshoot this problem, you configured trace options to monitor BGP protocol message exchanges.

Referring to the exhibit, which action would solve the problem?

A. Modify the security policy to permit the BGP packets.
B. Add the junos-host zone policy to permit the BGP packets.
C. Add a firewall filter to lo0 that permits the BGP packets.
D. Add BGP to the lo0 host-inbound-traffic configuration.

Answer: B

Explanation:
In Juniper SRX devices, for IBGP (internal BGP) sessions to be established, the firewall must permit BGP traffic to the loopback interface (lo0). BGP uses TCP port 179, and the device must explicitly allow incoming connections to this port. The trace options show that the packets are reaching the firewall but are not permitted.
* Correct Action (A): Adding a security policy to thejunos-hostzone will permit the BGP packets. The junos-hostzone represents traffic destined for the control plane (e.g., BGP traffic to the loopback interface). By creating a security policy that allows traffic on TCP port 179 to thejunos-hostzone, the IBGP session will be able to establish.
Juniper References:
* Juniper SRX Host-inbound Traffic Configuration: Explains the importance of allowing host-inbound traffic for control plane protocols like BGP on the SRX devices.

NEW QUESTION # 82
Exhibit:

Your company uses SRX Series devices to establish an IPsec VPN that connects Site-1 and the HQ networks.
You want VoIP traffic to receive priority over data traffic when it is forwarded across the VPN.
Which three actions should you perform in this scenario? (Choose three.)

A. Create a firewall filter that identifies VoIP traffic and associates it with the correct forwarding class.
B. Enable next-hop tunnel binding.
C. Configure CoS forwarding classes and scheduling parameters.
D. Enable the copy-outer-dscp parameter so that DSCP header values are copied to the tunneled packets.
E. Enable the multi-sa parameter to enable two separate IPsec SAs for the VoIP and data traffic.

Answer: A,B,C

Explanation:
In this scenario, you are prioritizing VoIP traffic over data traffic across an IPsec VPN. Here are the necessary actions:
* Enable next-hop tunnel binding (Answer A): This is required to bind the VPN traffic to a specific tunnel interface (like st0.0). It allows differentiated forwarding behavior (like prioritizing VoIP) for specific traffic types.
Command Example:
bash
Copy code
set interfaces st0.0 next-hop-tunnel-service
* Create a firewall filter (Answer B): The filter will match VoIP traffic based on criteria such as DSCP marking or ports (like port 5060 for SIP). Once identified, the traffic will be associated with a forwarding class, ensuring it gets prioritized.
Command Example:
bash
Copy code
set firewall family inet filter VoIP-Filter term VoIP from protocol udp set firewall family inet filter VoIP-Filter term VoIP from port 5060 set firewall family inet filter VoIP-Filter term VoIP then forwarding-class voice
* Configure CoS (Class of Service) forwarding classes (Answer C): CoS parameters define how the SRX handles different types of traffic (scheduling, shaping, etc.). VoIP traffic must be assigned a higher priority than data.
Command Example:
bash
Copy code
set class-of-service forwarding-classes voice
set class-of-service forwarding-classes data
set class-of-service schedulers voice_scheduler transmit-rate percent 50 These configurations ensure that VoIP traffic is identified, classified, and forwarded with priority.

NEW QUESTION # 83
......

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