View Full Juniper JN0-336 Exam Dumps and Practice Test Dumps

 

Question 141.

Which feature controls traffic between security zones?

1. Security policy
2. Routing protocol
3. Certificate profile
4. Logging stream

Correct Answer: 1

Explanation:

A security policy controls whether traffic is permitted or denied between security zones on an SRX device. Policies evaluate configured match conditions such as source and destination zones, addresses, applications, services, and other supported criteria. After a policy matches, its configured action determines how the traffic is handled. Routing protocols determine forwarding information, certificate profiles support authentication or trust operations, and logging streams provide event visibility. Security policies therefore form a central enforcement mechanism for controlling communication across trust boundaries and implementing organizational access requirements on the SRX firewall.

Question 142.

Which Junos command mode displays active configuration?

1. Operational mode
2. Configuration mode
3. Shell environment
4. Monitor mode

Correct Answer: 2

Explanation:

Configuration mode is used to view and modify the candidate configuration hierarchy in Junos. Administrators enter this mode when they need to create, change, delete, or inspect configuration statements before committing changes. Operational mode is primarily used for monitoring and executing operational commands, while the shell environment provides underlying operating-system access where permitted. Monitor mode has different diagnostic purposes. Understanding the distinction between Junos modes is important because configuration changes are made within the configuration hierarchy and become active only after an appropriate commit operation.

Question 143.

Which command can display active SRX sessions?

1. show route
2. show interfaces
3. show security flow session
4. show chassis hardware

Correct Answer: 3

Explanation:

The security flow session command displays information about active sessions handled by the SRX device. Session information can include source and destination addresses, ports, protocols, policies, interfaces, and other details depending on the command options and Junos version. This information is valuable when troubleshooting connectivity because it helps determine whether traffic successfully established a stateful session. Routing commands provide path information, interface commands show interface status, and chassis hardware commands display hardware details. Examining active security sessions is therefore an important diagnostic technique when investigating firewall traffic behavior.

Question 144.

Which feature can identify users from directory services?

1. Traffic shaping
2. User identification
3. NAT translation
4. Packet filtering

Correct Answer: 4

Explanation:

User identification associates network activity with authenticated users or directory identities, enabling security controls to use user information in addition to network addresses. Directory integration can provide identity information that is useful for user-based security policies and monitoring. Traffic shaping controls resource usage, NAT translation modifies addressing, and packet filtering evaluates network traffic against configured conditions. User identification is therefore useful when organizations need policies based on individuals or groups rather than only IP addresses. Proper identity integration can improve visibility and allow more granular access-control decisions within supported SRX deployments.

Question 145.

Which VPN component defines cryptographic algorithms?

1. IKE proposal
2. Security zone
3. Address book
4. Event policy

Correct Answer: 1

Explanation:

An IKE proposal defines cryptographic parameters used during IKE negotiation, such as authentication and encryption-related algorithms and other supported security settings. Both VPN peers must have compatible parameters for successful negotiation. Security zones organize interfaces and trust boundaries, address books contain reusable network objects, and event policies automate responses to system events. The IKE proposal therefore forms an important part of establishing secure negotiation parameters before an IPsec VPN can operate. Administrators troubleshooting IKE failures commonly verify that the proposals configured on both peers contain compatible cryptographic settings.

Question 146.

What identifies the protected traffic inside an IPsec VPN?

1. Security zone
2. Proxy identity
3. Web category
4. Attack object

Correct Answer: 2

Explanation:

An IPsec proxy identity identifies the traffic selectors associated with a VPN, defining which source and destination traffic should be protected by the IPsec tunnel. These identities are particularly important in policy-based VPN configurations because the peers must agree on the protected traffic parameters. Security zones establish trust boundaries, web categories classify destinations, and attack objects organize intrusion-detection signatures. Correct proxy-identity configuration ensures that the intended traffic enters the encrypted tunnel and that both VPN peers use compatible selectors. Mismatched identities can prevent successful tunnel establishment or leave expected traffic outside the VPN.

Question 147.

Which feature can restrict traffic based on authenticated groups?

1. User-based policy
2. Interface redundancy
3. Route redistribution
4. Packet fragmentation

Correct Answer: 3

Explanation:

User-based policies can use authenticated identity or group information to control access to network resources. This approach allows security enforcement to reflect organizational roles rather than relying exclusively on IP addresses. For example, different groups may receive different access permissions to applications or destinations. Interface redundancy provides high availability, route redistribution exchanges routing information, and packet fragmentation divides oversized network packets. User-based policy enforcement therefore provides identity-aware access control when the SRX has the required authentication and user-identification information available. It can be particularly useful in environments with centralized directory services.

Question 148.

Which setting can define a maximum connection lifetime?

1. Address object
2. Application signature
3. Session timeout
4. Routing instance

Correct Answer: 4

Explanation:

A session timeout defines how long a session can remain active without meeting the conditions required to keep it established. Timeout behavior varies according to session type and configuration, but it provides a mechanism for controlling the lifetime of stateful connections. Address objects identify network endpoints, application signatures support application recognition, and routing instances provide separate routing contexts. Proper timeout settings can help release unused session resources and maintain predictable firewall behavior. Administrators should consider application requirements when adjusting timeouts because overly short values may interrupt legitimate long-running connections.

Question 149.

Which feature can limit bandwidth for a traffic class?

1. Traffic shaping
2. Certificate validation
3. DNS inspection
4. Attack detection

Correct Answer: 1

Explanation:

Traffic shaping controls the rate at which traffic is transmitted and can be used to manage bandwidth consumption for selected traffic classes. Unlike simple filtering, shaping focuses on resource allocation and transmission behavior. Administrators can use it to prevent particular traffic categories from consuming excessive bandwidth and to support predictable service levels. Certificate validation concerns trust verification, DNS inspection examines name-resolution traffic, and attack detection identifies suspicious behavior. Traffic shaping is therefore a quality-of-service mechanism that helps manage network capacity according to configured traffic classes and operational requirements.

Question 150.

Which NAT type can translate a public address to an internal server?

1. Source NAT
2. Destination NAT
3. Static routing
4. Port monitoring

Correct Answer: 2

Explanation:

Destination NAT translates the destination address of incoming traffic so that a publicly reachable address can map to an internal server or service. This allows external clients to reach resources located behind the SRX while maintaining the internal addressing scheme. The associated NAT rule determines which traffic matches and how the destination is translated. Source NAT changes the source address, static routing controls forwarding paths, and port monitoring provides operational visibility. Destination NAT is therefore commonly used when publishing internal services through externally reachable addresses while still applying appropriate security policies.

Question 151.

Which mechanism can create a reusable service collection?

1. Service set
2. Routing policy
3. User profile
4. Certificate chain

Correct Answer: 3

Explanation:

A service set can group related service objects into a reusable collection for configuration purposes. This can simplify policy construction when several protocols or destination ports require the same treatment. Instead of repeatedly specifying individual services, administrators can reference the logical collection where supported. Routing policies influence path selection, user profiles contain identity-related information, and certificate chains establish trust relationships. Service grouping therefore improves configuration organization and can reduce repetitive policy statements. Proper service definitions are especially useful when security policies need to consistently permit or restrict multiple application services.

Question 152.

What can associate a security policy with specific applications?

1. Address translation
2. Application match
3. Cluster priority
4. Route metric

Correct Answer: 4

Explanation:

An application match allows a security policy to evaluate traffic according to the application identified by the SRX device. This provides more granular control than relying solely on IP addresses or transport ports. Administrators can create policies that permit or deny selected applications while treating other traffic differently. Address translation changes network addressing, cluster priority influences high-availability behavior, and route metrics contribute to path selection. Application-based policy matching is particularly valuable for modern environments where applications may use dynamic ports or multiple communication patterns that cannot be controlled reliably through simple port-based rules.

Question 153.

Which mechanism can detect malformed IP packets?

1. Protocol anomaly checking
2. Address grouping
3. Route summarization
4. User mapping

Correct Answer: 1

Explanation:

Protocol anomaly checking can identify packets that do not conform to expected protocol behavior or contain unusual structural characteristics. Such checks are useful because malformed traffic may indicate scanning, exploitation attempts, implementation weaknesses, or other abnormal activity. Address grouping organizes reusable network objects, route summarization combines network prefixes, and user mapping associates traffic with identities. Protocol anomaly detection therefore focuses on validating traffic behavior and structure rather than managing addressing or user information. Security screens and related inspection mechanisms can use protocol-oriented checks to provide an additional defensive layer against abnormal network traffic.

Question 154.

Which VPN feature verifies peer identity using certificates?

1. Source NAT
2. Certificate authentication
3. Session shaping
4. Application tracking

Correct Answer: 2

Explanation:

Certificate authentication verifies VPN peer identity using digital certificates rather than relying solely on a shared secret. During authentication, the certificate is evaluated against configured trust information and other validation requirements. This approach can support scalable VPN deployments where maintaining individual pre-shared keys for many peers would be difficult. Source NAT translates addresses, session shaping controls traffic resources, and application tracking provides application visibility. Certificate-based authentication therefore provides an identity-verification mechanism for IKE peers and depends on correctly configured certificates, trust anchors, and compatible authentication settings.

Question 155.

Which component stores reusable network address definitions?

1. Security screen
2. Address book
3. IKE gateway
4. Syslog facility

Correct Answer: 3

Explanation:

An address book stores reusable network address objects that can be referenced by security policies and related configuration. Address objects may represent individual hosts, subnets, or other supported network entities, allowing administrators to avoid repeatedly entering the same address information. Security screens provide attack-protection checks, IKE gateways define VPN peer connectivity and negotiation parameters, and syslog facilities organize event logging categories. Address books therefore improve configuration consistency and readability. They are particularly useful in larger environments where many policies reference the same servers, networks, or endpoint groups.

Question 156.

Which logging feature separates messages by facility?

1. Syslog facility
2. NAT rule
3. VPN proposal
4. Security zone

Correct Answer: 4

Explanation:

A syslog facility categorizes messages according to their originating subsystem or functional area. Facilities allow administrators to organize and route different classes of events to appropriate destinations or logging workflows. This can improve log management when a device generates information from multiple system and security components. NAT rules control address translation, VPN proposals define cryptographic negotiation parameters, and security zones establish traffic boundaries. Syslog facility selection therefore contributes to structured event management and can help administrators separate operational messages from other categories when forwarding SRX events to centralized logging infrastructure.

Question 157.

What can mirror selected traffic for external analysis?

1. Packet mirroring
2. Route preference
3. DNS forwarding
4. User authentication

Correct Answer: 1

Explanation:

Packet mirroring copies selected network traffic to another interface or monitoring destination so that it can be analyzed without directly interrupting the original traffic flow. This capability can assist troubleshooting, packet inspection, performance investigations, and security analysis when supported by the platform and configuration. Route preference determines preferred forwarding paths, DNS forwarding handles name-resolution requests, and user authentication verifies identities. Packet mirroring is therefore useful when administrators need an external analysis system to observe traffic characteristics that may not be fully visible through ordinary firewall logs or session information.

Question 158.

Which feature can classify destinations by reputation?

1. Session timeout
2. URL reputation
3. Interface monitoring
4. Tunnel addressing

Correct Answer: 2

Explanation:

URL reputation information can classify web destinations according to known trust or risk characteristics. Reputation-based controls can help security systems make decisions about whether a requested destination should be permitted, restricted, or logged. This approach complements category-based web filtering by adding intelligence about specific destinations or domains. Session timeout controls connection duration, interface monitoring observes interface conditions, and tunnel addressing defines VPN interface information. URL reputation is therefore relevant to web-security decisions where destination trustworthiness is an important factor in determining access.

Question 159.

Which protocol can dynamically exchange routes across a VPN?

1. FTP
2. SMTP
3. OSPF
4. SNMP

Correct Answer: 3

Explanation:

OSPF can dynamically exchange routing information across a suitable VPN topology when the tunnel and routing configuration support it. Using a dynamic routing protocol can reduce the need to maintain numerous static routes and allows network changes to propagate automatically between participating routers. FTP transfers files, SMTP transports email, and SNMP provides network-management information. OSPF therefore belongs to the routing category and can contribute to dynamic route learning across interconnected network segments. Proper routing-instance, interface, and VPN configuration is still required for the protocol to operate as intended.

Question 160.

Which setting determines how long an idle UDP session remains?

1. Address-set membership
2. Web-filter category
3. Certificate validity
4. UDP session timeout

Correct Answer: 4

Explanation:

The UDP session timeout determines how long an inactive UDP session can remain in the SRX session table before being removed. Unlike TCP, UDP does not provide the same connection-oriented lifecycle, so firewalls rely on timeout values to manage state for UDP traffic. Address-set membership organizes network objects, web-filter categories classify destinations, and certificate validity determines whether a certificate remains trusted or usable. Appropriate UDP timeout values help balance resource management with application requirements. Administrators should consider the behavior of the specific UDP application when selecting or modifying timeout settings.