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Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q101-Q106):

NEW QUESTION # 101
Exhibit:

You are asked to ensure that Internet users can access the company's internal webserver using its FQDN.
However, the internal DNS server's A record only points to the webserver's private address.
Referring to the exhibit, which two actions are required to complete this task? (Choose two.)

A. Configure proxy ARP on ge-0/0/3.
B. Configure destination NAT for both the DNS server and the webserver.
C. Configure static NAT for both the DNS server and the webserver.
D. Disable the DNS ALG.

Answer: A,C

Explanation:
In the scenario where internal users are trying to access the company's web server via its FQDN but the DNS server resolves to a private IP, two key actions are needed:
* Static NAT (Answer B): Since the internal DNS server resolves the web server to its private IP address (10.10.10.4/24), you need to configure static NAT for both the DNS server and the webserver. This will ensure that requests coming from the internet will be translated to the web server's public IP (203.0.113.4) and the DNS server's public IP (203.0.113.2).
Example Command:
bash
set security nat static rule-set public-to-private from zone untrust
set security nat static rule-set public-to-private rule dns-server match destination-address 203.0.113.2/32 set security nat static rule-set public-to-private rule dns-server then static-nat-prefix 10.10.10.2/32 set security nat static rule-set public-to-private rule web-server match destination-address 203.0.113.4/32 set security nat static rule-set public-to-private rule web-server then static-nat-prefix 10.10.10.4/32
* Proxy ARP (Answer D): The SRX needs to respond to ARP requests for the public IP addresses of both the DNS and webserver on the interface facing the internet (ge-0/0/3). This allows the SRX to handle requests directed at the public IPs.
Example Command:
set interfaces ge-0/0/3 unit 0 family inet proxy-arp interface-address 203.0.113.2/32 set interfaces ge-0/0/3 unit 0 family inet proxy-arp interface-address 203.0.113.4/32 These two configurations allow external users to access the internal web server via its public IP, as resolved by the DNS server.

NEW QUESTION # 102
You are asked to see if your persistent NAT binding table is exhausted. Which show command would you use to accomplish this task?

A. show security nat source persistent-nat-table all
B. show security nat source persistent-nat-table summary
C. show security nat source pool all
D. show security nat source summary

Answer: A

Explanation:
The command show security nat source persistent-nat-table all provides a comprehensive view of all entries in the persistent NAT table, enabling administrators to monitor and manage resource exhaustion.
In Junos OS, when persistent NAT is configured, a binding table is created to keep track of NAT sessions and ensure that specific hosts are allowed to initiate sessions back to internal hosts. To check if the persistent NAT binding table is full or exhausted, the correct command must display the entire table.
The command show security nat source persistent-nat-table all will display the entire persistent NAT binding table. This allows you to check whether the table is exhausted or if there is space available for new persistent NAT sessions.

NEW QUESTION # 103
Exhibit

Referring to the exhibit, which two statements are true? (Choose two.)

A. The data that traverses the ge-070/0 interface can be intercepted and read by anyone.
B. The data that traverses the ge-0/070 interface is secured by a secure association key.
C. The data that traverses the ge-O/0/0 interface is secured by a connectivity association key.
D. The data that traverses the ge-070/0 interface cannot be intercepted and read by anyone.

Answer: A,D

NEW QUESTION # 104
What is the advantage of using separate st0 logical units for each spoke connection?

A. It is easy to configure even when managing many st0 units.
B. It facilitates scalability.
C. Junos devices can exchange NHTB data automatically using this method.
D. It enables assignments of different settings to each logical unit.

Answer: B

Explanation:
Using separatest0 logical unitsfor each spoke connection in a hub-and-spoke VPN topology is advantageous for scalability. Here's why:
* Facilitates Scalability (Correct: Option B):By using separatest0logical units for each spoke, you can easily scale the number of spokes without disrupting the overall configuration. Each spoke gets its own dedicated logical unit, making it easier to manage individual VPN tunnels as the network grows. This approach provides clear separation of traffic, simplifying troubleshooting and configuration management, especially in large hub-and-spoke networks.
* Incorrect Options:
* Option A: While separate logical units make configuration management easier, scalability is the primary advantage.
* Option C: NHTB (Next-Hop Tunnel Binding) data exchange does not inherently depend on the use of separate logical units.
* Option D: While you can assign different settings to each logical unit, the main advantage remains scalability, especially when managing numerous VPN connections.
Juniper References:
* Juniper IPsec VPN Documentation: Describes how using separate logical units facilitates scalability and is a best practice for large-scale hub-and-spoke VPN deployments.

NEW QUESTION # 105
All interfaces involved in transparent mode are configured with which protocol family?

A. mpls
B. bridge
C. ethernet - switching
D. inet

Answer: B

NEW QUESTION # 106
......

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Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q101-Q106):

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