Juniper JN0-232 Test Answers & Knowledge JN0-232 Points

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Juniper JN0-232 Exam Syllabus Topics:

SectionObjectives
Security Policies and NAT- Policy configuration
  • 1. Policy matching logic
    • 2. Security zones and policies
      - Network Address Translation
      • 1. Source NAT and destination NAT
        • 2. NAT troubleshooting basics
          VPN and Secure Connectivity- IPsec VPN fundamentals
          • 1. Site-to-site VPN concepts
            • 2. VPN components and phases
              Security Fundamentals- Network security concepts
              • 1. Security principles (CIA triad)
                • 2. Threat types and attack vectors
                  Security Services and Monitoring- Security services overview
                  • 1. Logging and monitoring tools
                    • 2. Firewall filters vs security policies
                      Juniper SRX Platform Basics- Junos security architecture
                      • 1. SRX operating modes
                        • 2. Packet flow processing

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                          Juniper Security, Associate (JNCIA-SEC) Sample Questions (Q62-Q67):

                          NEW QUESTION # 62
                          Which feature would you use to protect clients connected to an SRX Series device from a SYN flood attack?

                          Answer: B

                          Explanation:
                          A screen option in the SRX Series device can be used to protect clients connected to the device from a SYN flood attack. Screens are security measures that you can use to protect your network from various types of attacks, including SYN floods. A screen option specifies a set of rules to match against incoming packets, and it can take specific actions such as discarding, logging, or allowing the packets based on the rules.


                          NEW QUESTION # 63
                          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: D

                          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 # 64
                          You need to capture control plane traffic on a high-end SRX Series device.
                          How would you accomplish this task?

                          Answer: C

                          Explanation:
                          On high-end SRX platforms, control-plane (Routing Engine-destined) traffic transits the loopback (lo0) and is best captured by applying a firewall filter on lo0 with the then sample action, together with traffic sampling under forwarding-options to write packets to a file.
                          sample sends matched control-plane packets to the sampling process, which can record them for analysis.
                          datapath-debug capture focuses on data-plane/SPC paths and is not the tool for generic control-plane packet capture.
                          tcpdump from shell is not the supported workflow on SRX; the operational command is monitor traffic, but for high-end control-plane capture, the recommended and scalable method is lo0 filter + sampling.
                          Port mirroring mirrors transit data-plane traffic, not RE-destined control-plane packets.


                          NEW QUESTION # 65
                          What are three requirements for creating a custom application? (Choose three.)

                          Answer: A,D,E

                          Explanation:
                          To create a custom application on an SRX Series Firewall, you must define:
                          - The port number, which specifies where the application listens or communicates.
                          - The application name, which uniquely identifies the custom application within the configuration.
                          - The protocol (such as TCP or UDP), which determines how traffic is handled and matched for that application.


                          NEW QUESTION # 66
                          Which two addresses are valid address book entries? (Choose two.)

                          Answer: A,D

                          Explanation:
                          The correct address book entries are:
                          173.145.5.21/255.255.255.0
                          203.150.108.10/24
                          Both of these entries represent a valid IP address and subnet mask combination, which can be used as an address book entry in a Juniper device.


                          NEW QUESTION # 67
                          ......

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