Juniper JN0-232 Online Practice Questions and Exam Preparation

Juniper JN0-232 Online Questions & Answers

• Question 41:

  Which two types of traffic are processed by the Routing Engine rather than the Packet Forwarding Engine? (Choose two.)

  A. transit HTTP traffic
  B. OSPF hello packets
  C. SSH management traffic to the SRX
  D. ICMP echo requests between zones
  B. OSPF hello packets
  C. SSH management traffic to the SRX

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  Routing updates (OSPF) and management traffic destined to the SRX (SSH) are exception traffic handled by the RE. Transit HTTP and inter-zone ICMP are forwarding-plane traffic.

• Question 42:

  Click the Exhibit button.

  

  What is the purpose of the host-inbound-traffic configuration shown in the exhibit?

  A. to permit host inbound HTTP traffic and deny all other traffic on the internal security zone
  B. to deny and log all host inbound traffic on the internal security zone, except for HTTP traffic
  C. to permit all host inbound traffic on the internal security zone, but deny HTTP traffic
  D. to permit host inbound HTTP traffic on the internal security zone
  C. to permit all host inbound traffic on the internal security zone, but deny HTTP traffic

• Question 43:

  What are two system-defined zones created on the SRX Series Firewalls? (Choose two.)

  A. null
  B. junos-host
  C. management D. DMZ
  A. null
  B. junos-host

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  On SRX Series Firewalls, Junos OS automatically createssystem-defined zonesthat have special functions:

  Null zone (Option A):A predefined discard zone. By default, all interfaces belong to the null zone until assigned to a user-defined zone. Traffic destined to the null zone is dropped. Junos-host zone (Option B):A predefined functional zone that allows security policies to control traffic directed to the SRX device itself (management traffic, such as SSH, HTTP, SNMP).

  Management zone (Option C):There is a predefinedmanagement functional zone, but it is not called "management" as a system-defined security zone. DMZ (Option D):A DMZ zone must be explicitly created by the administrator, it is not system-defined.

  Correct Zones:null, junos-host

  Juniper Networks Security Zones and Functional Zones, Junos OS Security Fundamentals.

• Question 44:

  What information does the show chassis routing-engine command provide?

  A. chassis serial number
  B. resource utilization
  C. system version
  D. routing tables
  B. resource utilization

• Question 45:

  You are troubleshooting first path traffic not passing through an SRX Series Firewall. You have determined that the traffic is ingressing and egressing the correct interfaces using a route lookup. In this scenario, what is the next step in troubleshooting why the device may be dropping the traffic?

  A. Verify that the interfaces are in the correct security zones.
  B. Verify the routing protocol being used.
  C. Verify that source NAT is occurring.
  D. Verify that the correct ALG is being used.
  A. Verify that the interfaces are in the correct security zones.

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  After confirming correct routing:

  The next step is toverify security zone assignments (Option A). If interfaces are not correctly assigned to zones, traffic will not be evaluated against proper inter-zone or intra-zone security policies, causing drops.

  Option B:The routing protocol is irrelevant once the correct route lookup is confirmed.

  Option C:NAT is checked later in the flow, not the immediate next step after routing.

  Option D:ALG is only needed for specific applications (FTP, SIP), not general troubleshooting.

  Correct Next Step:Verify that interfaces are assigned to the correct security zones.

  Juniper Networks Packet Flow and Zone-Based Policy Evaluation, Junos OS Security Fundamentals.

• Question 46:

  Click the Exhibit button.

  

  Referring to the exhibit, which two statements are correct about the traffic flow shown in the exhibit? (Choose two.)

  A. There is no change to the original source IP address.
  B. The original source IP address was translated to a new source IP address.
  C. There is no change to the original destination IP address.
  D. The original destination IP address was translated to a new destination IP address.
  B. The original source IP address was translated to a new source IP address.
  D. The original destination IP address was translated to a new destination IP address.

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  Inbound Flow (before NAT):Source =10.20.30.40(internal private IP)Destination =203.0.113.1(public

  DNS server)

  Outbound Flow (after NAT):Source =192.0.2.1(translated IP)Destination =203.0.113.1(unchanged)

  Analysis:

  Thesource IP (10.20.30.40)was translated to192.0.2.1. This indicatesSource NATwas applied #Option B is correct. Thedestination IP changedbetween the inbound and outbound view. Inbound it was203.0.113.1, and outbound it is still203.0.113.1in appearance, but notice the reversal: the session entry shows it as the outbound "source" side. This confirmsDestination NAT translation has occurredfor return flow consistency #Option D is correct.

  Option A:Incorrect. The original source IP was indeed translated. Option C:Incorrect. The destination IP did change in the flow processing. Correct Statements:

  The original source IP address was translated to a new source IP address. The original destination IP address was translated to a new destination IP address.

  Juniper Networks Security Flow Session Output and NAT Translations, Junos OS Security Fundamentals.

• Question 47:

  Which statement is correct about Web filtering?

  A. Enhanced Web Filtering requires a locally managed server.
  B. Decision is based on HTTP body content.
  C. Decision is based on the URL category.
  D. The client receives email notification when blocked.
  C. Decision is based on the URL category.

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  Web filtering categorizes URLs and permits/blocks based on URL category.

• Question 48:

  You must verify that SSL proxy is actively decrypting HTTPS traffic. Which command displays SSL proxy statistics on an SRX?

  A. show security ssl proxy statistics
  B. show security utm web-filtering status
  C. show security policies detail
  D. show interfaces extensive
  A. show security ssl proxy statistics

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  show security ssl proxy statistics reports SSL inspection sessions, decrypted connections, and certificate usage.

• Question 49:

  Which statement about NAT is correct?

  A. Destination NAT takes precedence over static NAT
  B. Source NAT is processed before security policy lookup
  C. Static NAT is processed after forwarding lookup
  D. Static NAT takes precedence over destination NAT
  D. Static NAT takes precedence over destination NAT

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  NAT precedence: static NAT - destination NAT - source NAT.

• Question 50:

  Which two statements about the host-inbound-traffic parameter in a zone configuration are correct? (Choose two.)

  A. Deleting the host-inbound-traffic parameter blocks console access to the firewall.
  B. Deleting the host-inbound-traffic parameter blocks SSH access to the firewall.
  C. The host-inbound-traffic parameter is implicitly configured in the management zone.
  D. The host-inbound-traffic parameter is explicitly configured in a security zone.
  B. Deleting the host-inbound-traffic parameter blocks SSH access to the firewall.
  D. The host-inbound-traffic parameter is explicitly configured in a security zone.

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  SSH Access (Option B):Host-inbound-traffic controls traffic destined to the SRX device itself (management/control plane). If host-inbound-traffic is not configured to allow SSH, then SSH access to the firewall is blocked.

  Explicit Zone Configuration (Option D):For user-defined security zones, host-inbound-traffic must be explicitly configured to allow specific services (SSH, ICMP, SNMP, etc.).

  Console Access (Option A):Console access is not controlled by host-inbound-traffic. Console access is always available directly.

  Management Zone (Option C):In the management functional zone, host-inbound-traffic is implicitly allowed for management services, so this is not explicitly required.

  Correct Statements:B and D

  Juniper Networks Host-Inbound-Traffic and Zone Services, Junos OS Security Fundamentals.