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Juniper Security, Professional (JNCIP-SEC) Sample Questions (Q36-Q41):

NEW QUESTION # 36
Exhibit:

Referring to the exhibit, your company's infrastructure team implemented new printers. To make sure that the policy enforcer pushes the updated Ip address list to the SRX.
Which three actions are required to complete the requirement? (Choose three)

A. Configure server feed URL as https://172.25.10.254/myprinters.
B. Create a security policy that uses the dynamic address feed to allow access
C. Configure Security Director to create a dynamic address feed
D. Configure the server feed URL as http://172.25.10.254/myprinters
E. Configure Security Director to create a C&C feed.

Answer: B,C,D

Explanation:
Referring to the exhibit, your company's infrastructure team implemented new printers. To make sure that the policy enforcer pushes the updated IP address list to the SRX, you need to perform the following actions:
A) Configure the server feed URL as http://172.25.10.254/myprinters. The server feed URL is the address of the remote server that provides the custom feed data. You need to configure the server feed URL to match the location of the file that contains the IP addresses of the new printers. In this case, the file name is myprinters and the server IP address is 172.25.10.254, so the server feed URL should be
http://172.25.10.254/myprinters1.
B) Create a security policy that uses the dynamic address feed to allow access. A security policy is a rule that defines the action to be taken for the traffic that matches the specified criteria, such as source and destination addresses, zones, protocols, ports, and applications. You need to create a security policy that uses the dynamic address feed as the source or destination address to allow access to the new printers. A dynamic address feed is a custom feed that contains a group of IP addresses that can be entered manually or imported from external sources. The dynamic address feed can be used in security policies to either deny or allow traffic based on either source or destination IP criteria2.
C) Configure Security Director to create a dynamic address feed. Security Director is a Junos Space application that enables you to create and manage security policies and objects. You need to configure Security Director to create a dynamic address feed that contains the IP addresses of the new printers.
You can create a dynamic address feed by using the local file or the remote file server option. In this case, you should use the remote file server option and specify the server feed URL as
http://172.25.10.254/myprinters3.
The other options are incorrect because:
D) Configuring Security Director to create a C&C feed is not required to complete the requirement. A C&C feed is a security intelligence feed that contains the IP addresses of servers that are used by malware or attackers to communicate with infected hosts. The C&C feed is not related to the new printers or the dynamic address feed.
E) Configuring the server feed URL as https://172.25.10.254/myprinters is not required to complete the requirement. The server feed URL can use either the HTTP or the HTTPS protocol, depending on the configuration of the remote server. In this case, the exhibit shows that the remote server is using the HTTP protocol, so the server feed URL should use the same protocol1.
Reference: Configuring the Server Feed URL Dynamic Address Overview Creating Custom Feeds
[Command and Control Feed Overview]

NEW QUESTION # 37
Exhibit

Which two statements are correct about the output shown in the exhibit. (Choose two.)

A. The source address is translated.
B. The packet matches a user-configured policy
C. The packet is an SSH packet
D. The destination address is translated.

Answer: A,C

NEW QUESTION # 38
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
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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
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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 # 39
What are three core components for enabling advanced policy-based routing? (Choose three.)

A. APBR profile
B. Filter-based forwarding
C. Routing options
D. Routing instance
E. Policies

Answer: A,B,D

Explanation:
To enable Advanced Policy-Based Routing (APBR) on SRX Series devices, three key components are necessary: filter-based forwarding, routing instances, and APBR profiles. Filter-based forwarding is utilized to direct specific traffic flows to a routing instance based on criteria set by a policy. Routing instances allow the traffic to be managed independently of the main routing table, and APBR profiles define how and when traffic should be forwarded. These elements ensure that APBR is flexible and tailored to the network's requirements. Refer to Juniper's APBR Documentation for more details.
Advanced policy-based routing (APBR) in Juniper's SRX devices allows the selection of different paths for traffic based on policies, rather than relying purely on routing tables. To enable APBR, the following core components are required:
* Filter-based Forwarding (Answer A):Filter-based forwarding (FBF) is a technique used to forward traffic based on policies rather than the default routing table. It is essential for enabling APBR, as it helps match traffic based on filters and directs it to specific routes.
Configuration Example:
bash
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set firewall family inet filter FBF match-term source-address 192.168.1.0/24 set firewall family inet filter FBF then routing-instance custom-routing-instance
* Routing Instance (Answer C):A routing instance is required to define the separate routing table used by APBR. You can create multiple routing instances and assign traffic to these instances based on policies. The traffic will then use the routes defined within the specific routing instance.
Configuration Example:
bash
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set routing-instances custom-routing-instance instance-type forwarding
set routing-instances custom-routing-instance routing-options static route 0.0.0.0/0 next-hop 10.10.10.1
* APBR Profile (Answer D):The APBR profile defines the rules and policies for advanced policy-based routing. It allows you to set up conditions such as traffic type, source/destination address, and port, and then assign actions such as redirecting traffic to specific routing instances.
Configuration Example:
bash
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set security forwarding-options advanced-policy-based-routing profile apbr-profile match application http set security forwarding-options advanced-policy-based-routing profile apbr-profile then routing-instance custom-routing-instance Other Components:
* Routing Options (Answer B)are not a core component of APBR, as routing options define the general behavior of the routing table and protocols. However, APBR works by overriding these default routing behaviors using policies.
* Policies (Answer E)are crucial in many network configurations but are not a core component of enabling APBR. APBR specifically relies on profiles rather than standard security policies.
Juniper Security Reference:
* Advanced Policy-Based Routing (APBR): Juniper's APBR is a powerful tool that allows routing based on specific traffic characteristics rather than relying on static routing tables. APBR ensures that specific types of traffic can take alternate paths based on business or network needs. Reference: Juniper Networks APBR Documentation.

NEW QUESTION # 40
The exhibit shows part of the flow session logs.

Which two statements are true in this scenario? (Choose two.)

A. Junos captures a TCP packet from source address 172.20.101.10 destined to 10.0.1.129.
B. The existing session is found in the table, and the fast path process begins.
C. Destination NAT occurs.
D. This packet arrives on interface ge-0/0/4.0.

Answer: A,D

Explanation:
From the session log, we can derive the following:
* Packet arrives on ge-0/0/4.0 (Answer B): The log indicates that the incoming packet is being processed on the ge-0/0/4.0 interface, as seen in the output.
Example Log Analysis:
ruby
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CID-0:THREAD_ID-01:RT: chose interface ge-0/0/4.0 as incoming nat if.
* TCP Packet Captured (Answer C): The source of the packet is 172.20.101.10 and it is destined for
10.0.1.129 on port 22, as described in the log.
Example Log Analysis:
ruby
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CID-0:THREAD_ID-01:RT: CID-0:THREAD_ID-01:RT: flow_first_create_session...
sa 172.20.101.10, da 10.0.1.129, sp 59009, dp 22
These logs show the creation of a session for TCP traffic (likely SSH, based on port 22) between the source and destination addresses across the tunnel.

NEW QUESTION # 41
......

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