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Juniper JN0-331

JN0-331

Exam Code: JN0-331

Exam Name: SEC,Specialist(JNCIS-SEC)

Updated: Sep 12, 2026

Q & A: 131 Questions and Answers

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About Juniper JN0-331 Exam

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Juniper JN0-331 Exam Syllabus Topics:

SectionObjectives
Topic 1: Security Fundamentals- Network security concepts
  • 1. Security zones and policies basics
    • 2. Threat types and attack vectors
      Topic 2: VPN Technologies- IPsec VPN
      • 1. VPN troubleshooting basics
        • 2. IKE phases and negotiation
          - VPN implementation
          • 1. Site-to-site VPN concepts
            • 2. Policy-based vs route-based VPNs
              Topic 3: Troubleshooting and Operations- Security troubleshooting
              • 1. Policy evaluation issues
                • 2. VPN connectivity diagnostics
                  Topic 4: NAT (Network Address Translation)- NAT types and use cases
                  • 1. Source NAT
                    • 2. Destination NAT
                      • 3. Static NAT
                        Topic 5: Security Policies and Firewall Filters- Policy configuration
                        • 1. Policy ordering and evaluation
                          • 2. Match criteria and actions
                            - Firewall filters
                            • 1. Filter terms and rules
                              • 2. Apply filters to interfaces
                                Topic 6: Security Services and Features- Advanced security features
                                • 1. Screening and DoS protection basics
                                  • 2. Logging and monitoring

                                    Juniper SEC,Specialist(JNCIS-SEC) Sample Questions:

                                    Question #1
                                    Click the Exhibit button.
                                    [edit groups]
                                    user@host# show
                                    node0 {
                                    system {
                                    host-name NODE0;
                                    }
                                    interfaces {
                                    fxp0 {
                                    unit 0 {
                                    family inet {
                                    address 1.1.1.1/24;
                                    }}}}}
                                    node1 {
                                    system {
                                    host-name NODE1;
                                    }
                                    interfaces {
                                    fxp0 {
                                    unit 0 {
                                    family inet {
                                    address 1.1.1.2/24;
                                    }}}}}
                                    In the exhibit, what is the function of the configuration statements?

                                    A. This section is where you define all chassis clustering configuration.
                                    B. You can apply this configuration in the chassis cluster to make configuration easier.
                                    C. This configuration is required for members of a chassis cluster to talk to each other.
                                    D. This section is where unique node configuration is applied.


                                    Question #2
                                    A network administrator wants to permit Telnet traffic initiated from the address book entry
                                    the10net in a zone called UNTRUST to the address book entry Server in a zone called TRUST.
                                    However, the administrator does not want the server to be able to initiate any type of traffic
                                    from the TRUST zone to the UNTRUST zone.
                                    Which configuration would correctly accomplish this task?

                                    A. from-zone UNTRUST to-zone TRUST {
                                    policy AllowTelnetin {
                                    match {
                                    source-address the10net;
                                    destination-address Server;
                                    application junos-ftp;
                                    }
                                    then {
                                    permit;
                                    }}}
                                    B. from-zone UNTRUST to-zone TRUST {
                                    policy DenyServer {
                                    match {
                                    source-address any;
                                    destination-address any;
                                    application any;
                                    }
                                    then {
                                    deny;
                                    }}}
                                    from-zone TRUST to-zone UNTRUST {
                                    policy AllowTelnetin {
                                    match {
                                    source-address the10net;
                                    destination-address Server;
                                    application junos-telnet;
                                    }
                                    then {
                                    permit;
                                    }}}
                                    C. from-zone TRUST to-zone UNTRUST {
                                    policy DenyServer {
                                    match {
                                    source-address Server;
                                    destination-address any;
                                    application any;
                                    }
                                    then {
                                    permit;
                                    }}}
                                    from-zone UNTRUST to-zone TRUST {
                                    policy AllowTelnetin {
                                    match {
                                    source-address the10net;
                                    destination-address Server;
                                    application junos-telnet;
                                    } then { permit; }}}
                                    D. from-zone TRUST to-zone UNTRUST {
                                    policy DenyServer {
                                    match {
                                    source-address Server;
                                    destination-address any;
                                    application any;
                                    }
                                    then {
                                    deny;
                                    }
                                    }}
                                    from-zone UNTRUST to-zone TRUST {
                                    policy AllowTelnetin {
                                    match {
                                    source-address the10net;
                                    destination-address Server;
                                    application junos-telnet;
                                    }
                                    then {
                                    permit;
                                    }}}


                                    Question #3
                                    Which two statements are true regarding firewall user authentication? (Choose two.)

                                    A. Firewall user authentication provides an additional method of controlling user access to the JUNOS security device itself.
                                    B. Firewall user authentication provides an additional method of controlling user access to remote networks..
                                    C. Firewall user authentication is performed only for traffic that is accepted by a security policy.
                                    D. Firewall user authentication is performed only for traffic that is denied by a security policy.


                                    Question #4
                                    Which two traffic types trigger pass-through firewall user authentication? (Choose two.)

                                    A. SSH
                                    B. HTTP
                                    C. ICMP
                                    D. Telnet
                                    E. OSPF


                                    Question #5
                                    What is the purpose of an address book?

                                    A. It holds security policies for particular hosts.
                                    B. It holds statistics about traffic to and from particular hosts.
                                    C. It maps hostnames to IP addresses to serve as a backup to DNS resolution.
                                    D. It defines hosts in a zone so they can be referenced by policies.


                                    Solutions:

                                    Question #1
                                    Correct Answer: D
                                    Question #2
                                    Correct Answer: D
                                    Question #3
                                    Correct Answer: B,C
                                    Question #4
                                    Correct Answer: B,D
                                    Question #5
                                    Correct Answer: D

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