Kostenlose Enterprise Routing and Switching, Specialist (JNCIS-ENT) vce dumps & neueste JN0-351 examcollection Dumps

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Juniper JN0-351 Prüfungsplan:

Thema	Einzelheiten
Thema 1	OSPF: The concepts and operational details of OSPF are explored, providing tools for routing efficiency. Configuration and troubleshooting mastery ensure readiness for both the exam and complex enterprise environments.
Thema 2	IS-IS: Aspiring Juniper networking professionals enhance their understanding of IS-IS routing protocols. This topic equips candidates with the knowledge to configure and monitor IS-IS systems, addressing specific exam challenges and practical applications.
Thema 3	High Availability: This topic covers the importance and application of high availability within Junos OS environments. Knowledge in configuring and managing these components is critical for ensuring robust and uninterrupted network operations, aligning with exam expectations.
Thema 4	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Thema 5	Layer 2 Security: This topic introduces Layer 2 protection mechanisms and firewall filters to fortify network security. Practical skills in configuring, monitoring, and troubleshooting these features prepare candidates to address exam objectives and real-world challenges effectively.
Thema 6	Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
Thema 7	Layer 2 Switching or VLANs: This topic deepens the understanding of Layer 2 switching operations within the Junos OS, including VLAN concepts and benefits. Experienced networking professionals gain insights into configuration, monitoring, and troubleshooting techniques essential for network segmentation and efficiency.

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Juniper JN0-351 Fragen und Antworten, Enterprise Routing and Switching, Specialist (JNCIS-ENT) Prüfungsfragen

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) JN0-351 Prüfungsfragen mit Lösungen (Q43-Q48):

43. Frage
You have DHCP snooping enabled but no entries are automatically created in the snooping database for an interface on your EX Series switch. What are two reasons for the problem?
(Choose two.)

A. MAC limiting is enabled on the interface.
B. The device that is connected to the interface has performed a DHCPRELEASE.
C. Dynamic ARP inspection is enabled on the interface.
D. The device that is connected to the interface has a static IP address.

Antwort: B,D

Begründung:
If the device connected to the interface has performed a DHCPRELEASE, it releases its IP address back to the DHCP server, resulting in the removal of the corresponding DHCP snooping entry.
If the device connected to the interface is using a static IP address, it will not send DHCP requests, and therefore no entries will be created in the DHCP snooping database for that device.

44. Frage
You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario? (Choose two.)

A. Import policies are applied after the RIB-ln table.
B. Export policies are applied to routes in the RIB-ln table.
C. Export policies are applied after the RIB-Local table.
D. Import policies are applied to routes in the RIB-Local table.

Antwort: A,C

Begründung:
Explanation
In BGP, routing policies are used to control the flow of routing information between BGP peers1.
Option C suggests that import policies are applied after the RIB-In table. This is correct because import policies in BGP are applied to routes that are received from a BGP peer, before they are installed in the local BGP Routing Information Base (RIB-In)1. The RIB-In is a database that stores all the routes that are received from all peers1.
Option D suggests that export policies are applied after the RIB-Local table. This is correct because export policies in BGP are applied to routes that are being advertised to a BGP peer, after they have been selected from the local BGP Routing Information Base (RIB-Local)1. The RIB-Local is a database that stores all the routes that the local router is using1.
Therefore, options C and D are correct.

45. Frage
Which two statements about BGP facilitate the prevention of routing loops within an autonomous system? (Choose two.)

A. IBGP sessions must be configured as a physical full mesh.
B. IBGP sessions must be configured as a logical full mesh.
C. Routes learned from IBGP neighbors are only advertised to other IBGP neighbors.
D. Routes learned from IBGP neighbors are not readvertised to other IBGP neighbors.

Antwort: B,D

46. Frage
Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)

A. blocking
B. learning
C. listening
D. flooding

Antwort: B,D

Begründung:
* Option B is correct. Flooding is a mechanism used in Layer 2 bridging where the switch sends incoming packets to all its ports except for the port where the packet originated 1 . This is done when the switch doesn't know the destination MAC address or when the packet is a broadcast or multicast 1 .
* Option C is correct. Learning is another mechanism used in Layer 2 bridging where the switch learns the source MAC addresses of incoming packets and associates them with the port on which they were received 2 3 . This information is stored in a MAC address table, also known as a bridge table 2 3 .
* Option A is incorrect. Blocking is a state in Spanning Tree Protocol (STP) used to prevent loops in a network 2 . It's not a mechanism used in building and maintaining a Layer 2 bridge table 2 .
* Option D is incorrect. Listening is also a state in Spanning Tree Protocol (STP) where the switch listens for BPDUs to make sure no loops occur in the network before transitioning to the learning state
2 . It's not a mechanism used in building and maintaining a Layer 2 bridge table 2 .

47. Frage
An update to your organization's network security requirements document requires management traffic to be isolated in a non-default routing-instance. You want to implement this requirement on your Junos-based devices.
Which two commands enable this behavior? (Choose two.)

A. set system management--instance
B. set routing--instances mgmtjunoa interface ge-0/0/0.0
C. set routing--instances mgmt_junos interface em1
D. set routing--instances mgmt_junos

Antwort: A,D

Begründung:
To isolate management traffic in a non-default routing-instance on Junos-based devices, you can use the set system management-instance and set routing-instances mgmt_junos commands. set system management-instance: This command associates the management interface (usually named fxp0 or em0 for Junos OS, or re0:mgmt-* or re1:mgmt-* for Junos OS Evolved) with the non- default virtual routing and forwarding (VRF) instance. After you configure the non-default management VRF instance, management traffic no longer has to share a routing table with other control traffic or protocol traffic.
set routing-instances mgmt_junos: This command creates a new routing instance named mgmt_junos. The name of the dedicated management VRF instance is reserved and hardcoded as mgmt_junos; you cannot configure any other routing instance by the name mgmt_junos.
Therefore, options C and D are correct. Options A and B are not correct because they attempt to assign an interface to the mgmt_junos routing instance, which is not necessary for isolating management traffic.

48. Frage
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