Juniper JN0-232 Online Practice Questions and Exam Preparation

Juniper JN0-232 Online Questions & Answers

• Question 121:

  Which two statements about security zones are correct? (Choose two.)

  A. You add a network interface to a security zone before it can send or receive traffic.
  B. Security zones control the type of exception traffic accepted by a network interface.
  C. Interfaces in the same security zone can use different routing instances.
  D. A security zone includes interfaces assigned to different routing instances.
  A. You add a network interface to a security zone before it can send or receive traffic.
  B. Security zones control the type of exception traffic accepted by a network interface.

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  Adding interfaces (Option A):An interface must be assigned to a security zone before it can pass traffic. By default, interfaces are in the null zone and cannot send or receive traffic. Exception traffic (Option B):Security zones define host-inbound-traffic settings, which determine what types of management or control-plane traffic (SSH, ICMP, SNMP) are permitted. Routing instances (Options C and D):Security zones arespecific to a routing instanceand cannot include interfaces from multiple instances. Therefore, interfaces in the same zone cannot belong to different routing instances. Correct Statements:A and B Reference: Juniper Networks Security Zones Overview, Junos OS Security Fundamentals.

• Question 122:

  What is the correct order in which interface names should be identified?

  A. system slot number - interface media type - port number - line card slot number
  B. system slot number - port number - interface media type - line card slot number
  C. interface media type - system slot number - line card slot number - port number
  D. interface media type - port number - system slot number - line card slot number
  C. interface media type - system slot number - line card slot number - port number

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  Junos interface format: media type ?FPC ?PIC ?port.

• Question 123:

  Which two statements about the null zone on an SRX Series Firewall are correct? (Choose two.)

  A. Transit interfaces are assigned to the null zone by default.
  B. Traffic rejected by the security policy is sent to the null zone for logging.
  C. The null zone can be configured to accept traffic to or from the SRX Series Firewall.
  D. A logical interface configured in a security zone removes it from the null zone.
  A. Transit interfaces are assigned to the null zone by default.
  D. A logical interface configured in a security zone removes it from the null zone.

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  Default assignment:All logical interfaces are placed in thenull zone by defaultuntil explicitly assigned to a user-defined security zone (Option A is correct).

  Removal from null zone:Once an interface is assigned to a security zone, it is removed from the null

  zone (Option D is correct).

  No traffic acceptance:The null zone is a discard zone; it cannot be configured to accept any traffic (Option C is incorrect).

  Policy behavior:Traffic rejected by a security policy is dropped according to the policy action. It is not forwarded to the null zone for logging (Option B is incorrect).

  Correct Statements:A and D

  Juniper Networks Security Zones and the Null Zone, Junos OS Security Fundamentals.

• Question 124:

  A new SRX Series device has factory-default configuration. You power it on and connect to the console. What login credentials do you use?

  A. admin with no password
  B. root with a password of "juniper"
  C. root with no password
  D. admin with a password of "juniper"
  C. root with no password

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  Default SRX login is root with no password.

• Question 125:

  Content filtering supports which two of the following protocols? (Choose two.)

  A. SMTP
  B. SNMP
  C. TFTP
  D. HTTP
  A. SMTP
  D. HTTP

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  Content filtering on SRX devices inspects and controls specific file types transferred across certain application protocols:

  SMTP (Option A):Supported. Content filtering can block specific file attachments in emails.

  HTTP (Option D):Supported. Content filtering can block downloads of specific file types over web traffic.

  SNMP (Option B):Not supported; SNMP is a management protocol, not a content delivery protocol.

  TFTP (Option C):Not supported by content filtering.

  Correct Protocols:SMTP and HTTP

  Juniper Networks Content Security and Filtering Supported Protocols, Junos OS Security Fundamentals.

• Question 126:

  Which order is correct for Junos security devices that examine policies for transit traffic?

  A. zone policies - default policies
  B. default policies - global policies
  C. global policies - zone policies
  D. default policies - zone policies
  C. global policies - zone policies

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  Order: global policies - zone policies - default policies.

• Question 127:

  You want to block executable files (.exe) from being downloaded. Which UTM feature should you use?

  A. IPS
  B. Web filtering
  C. content filtering
  D. antivirus
  C. content filtering

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  Content filtering blocks file extensions such as .exe via MIME types or patterns.

• Question 128:

  Which feature protects clients from SYN flood attacks?

  A. security policy
  B. host inbound traffic
  C. application layer gateway
  D. screen option
  D. screen option

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  Screens provide DoS protections including SYN flood mitigation.

• Question 129:

  Which two statements about destination NAT are correct? (Choose two.)

  A. Destination NAT enables hosts on a private network to access resources on the Internet.
  B. SRX Series Firewalls support interface-based destination NAT.
  C. Destination NAT enables hosts on the Internet to access resources on a private network.
  D. SRX Series Firewalls support pool-based destination NAT.
  C. Destination NAT enables hosts on the Internet to access resources on a private network.
  D. SRX Series Firewalls support pool-based destination NAT.

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  Destination NAT purpose (Option C):Used to allow external hosts on the Internet to access internal /private resources (such as a web server in the DMZ). Destination NAT changes the destination IP of incoming traffic to match the internal server.

  Pool-based NAT (Option D):SRX supports destination NAT pools, allowing multiple public IP addresses or ranges to be translated to internal servers.

  Incorrect options: Option A describessource NAT, not destination NAT. Option B is incorrect because SRX does not support "interface-based" destination NAT.

  Correct Statements:C and D

  Juniper Networks NAT Types and Configurations (Source, Destination, and Static), Junos OS Security Fundamentals.

• Question 130:

  What happens if no match is found in both zone-based and global security policies?

  A. The traffic is discarded by the default security policy.
  B. The traffic is redirected to a predefined safe zone.
  C. The traffic is logged for further analysis.
  D. The traffic is allowed by default.
  A. The traffic is discarded by the default security policy.

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  SRX devices operate on adefault deny-all policyif no explicit match is found: If a packet does not match any configuredzone-basedorglobalpolicy, it is implicitly denied. The traffic is discarded silently by the default security policy (Option A). Option B:No predefined "safe zone" exists. Option C:Logging occurs only if explicitly configured; default deny does not automatically log traffic. Option D:Incorrect, since the firewall defaults to deny, not permit.

  Correct Behavior:Traffic is discarded by the default security policy.

  Juniper Networks Security Policy Evaluation and Default Deny Behavior, Junos OS Security Fundamentals.