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[General] Fast Download Juniper Exam JN0-351 Collection With Interarctive Test Engine &

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【General】 Fast Download Juniper Exam JN0-351 Collection With Interarctive Test Engine &

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Juniper JN0-351 Exam Syllabus Topics:
TopicDetails
Topic 1
  • BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Topic 2
  • 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.
Topic 3
  • Tunnels: The fundamentals of IP tunneling are emphasized, highlighting their requirements and functionalities. Mastery in configuring, monitoring, and troubleshooting tunnels equips professionals to meet the demands of the JN0-351 exam.
Topic 4
  • Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
Topic 5
  • 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.
Topic 6
  • 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.
Topic 7
  • Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q70-Q75):NEW QUESTION # 70
Which statement about the default action of MAC limiting is true when the number of MAC addresses has hit the limit set?
  • A. The switch stops learning MAC addresses on the offending port, and any traffic to or from the offending MAC address will be dropped.
  • B. The switch will shut down MAC learning on the offending port for five minutes.
  • C. The switch will shut down the offending port for five minutes.
  • D. The switch stops learning MAC addresses on the offending port, but floods traffic out of all ports for the offending MAC address.
Answer: A
Explanation:
According to the Juniper documentation 1 , MAC limiting is a feature that enhances port security by limiting the number of MAC addresses that can be learned within a VLAN. When the MAC limit is exceeded, the switch can perform different actions, such as ignoring, dropping, logging, shutting down, or disabling the offending port. The default action is to drop the packets with new MAC addresses and log a message 2 .
Therefore, the correct answer is B.
The other options are not correct because:
* A. The switch will not shut down the offending port for five minutes by default. This is a configurable action, but not the default one 2 .
* C. The switch will not flood traffic out of all ports for the offending MAC address by default. This is a possible consequence of ignoring the packets with new MAC addresses, but not the default action 2 .
* D. The switch will not shut down MAC learning on the offending port for five minutes by default. This is another configurable action, but not the default one 2 .
References: Understanding MAC Limiting and MAC Move Limiting | Junos OS , Configuring MAC Limiting | Junos OS

NEW QUESTION # 71
You are a network operator who wants to add a second ISP connection and remove the default route to the existing ISP You decide to deploy the BGP protocol in the network.
What two statements are correct in this scenario? (Choose two.)
  • A. IBGP updates the next-hop attribute to ensure reachability within an AS.
  • B. IBGP peers advertise routes received from IBGP peers to other IBGP peers.
  • C. IBGP peers advertise routes received from EBGP peers to other IBGP peers.
  • D. EBGP peers advertise routes received from IBGP peers to other EBGP peers.
Answer: C,D
Explanation:
BGP is a routing protocol that operates between autonomous systems (AS). An AS is a group of routers under a single administrative control. BGP can be classified into two types: internal BGP (IBGP) and external BGP (EBGP). IBGP is the BGP communication between routers within the same AS, while EBGP is the BGP communication between routers in different AS. BGP uses the AS_PATH attribute to record the AS numbers that the route has passed through, and uses it to prevent routing loops and select the best path.
In this scenario, you want to add a second ISP connection and remove the default route to the existing ISP.
This means that you want to have more control over the routing decisions and use BGP to exchange routes with both ISPs. To do this, you need to deploy the BGP protocol in your network and configure both IBGP and EBGP sessions. The correct statements about BGP in this scenario are:
* IBGP peers advertise routes received from EBGP peers to other IBGP peers. This is the default behavior of IBGP, as it allows the routers within the same AS to learn the routes from different EBGP peers and select the best exit point. However, IBGP has a rule that it does not advertise routes received from IBGP peers to other IBGP peers, to avoid creating routing loops. Therefore, option B is correct and option C is incorrect. To overcome this rule, IBGP requires a full mesh topology, where every IBGP router is directly connected to every other IBGP router, or a route reflector or confederation design, where some IBGP routers act as intermediaries to reflect or aggregate the routes to other IBGP routers.
* EBGP peers advertise routes received from IBGP peers to other EBGP peers. This is the default behavior of EBGP, as it allows the routers in different AS to exchange routes and reachability information. However, EBGP has a rule that it does not advertise routes received from EBGP peers to other EBGP peers, to avoid creating routing loops. Therefore, option D is correct and option A is incorrect. To overcome this rule, EBGP uses the AS_PATH attribute to filter out the routes that contain its own AS number, or uses route maps or policies to control the route advertisement. IBGP does not update the next-hop attribute to ensure reachability within an AS, as the next-hop attribute is preserved by IBGP. Instead, IBGP relies on an underlying IGP (Interior Gateway Protocol) to provide reachability to the next-hop.
References: Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks , BGP Fundamentals > BGP Overview | Cisco Press , BGP Essentials: The Protocol - Pluralsight

NEW QUESTION # 72
What does the * indicate in the output shown in the exhibit?

  • A. The interface is down.
  • B. All interfaces have elected a root bridge.
  • C. The switch ports have a router attached.
  • D. The interface is active.
Answer: D
Explanation:
The exhibit shows the output of the command show vlans brief, which displays brief information about VLANs and their associated interfaces.
The output has four columns: Routing instance, VLAN name, Interfaces, and Tagging. The * symbol indicates that the interface is active, meaning that it is up and forwarding traffic. This can be verified by the command show interfaces terse, which displays the status of the interfaces.

NEW QUESTION # 73
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. Dynamic ARP inspection is enabled on the interface.
  • B. The device that is connected to the interface has a static IP address.
  • C. The device that is connected to the interface has performed a DHCPRELEASE.
  • D. MAC limiting is enabled on the interface.
Answer: B,D
Explanation:
Explanation
The DHCP snooping feature in Juniper Networks' EX Series switches works by building a binding database that maps the IP address, MAC address, lease time, binding type, VLAN number, and interface information1. This database is used to filter and validate DHCP messages from untrusted sources1.
However, there are certain conditions that could prevent entries from being automatically created in the snooping database for an interface:
MAC limiting: If MAC limiting is enabled on the interface, it could potentially interfere with the operation of DHCP snooping. MAC limiting restricts the number of MAC addresses that can be learned on a physical interface to prevent MAC flooding attacks1. This could inadvertently limit the number of DHCP clients that can be learned on an interface, thus preventing new entries from being added to the DHCP snooping database.
Static IP address: If the device connected to the interface is configured with a static IP address, it will not go through the DHCP process and therefore will not have an entry in the DHCP snooping database1. The DHCP snooping feature relies on monitoring DHCP messages to build its database1, so devices with static IP addresses that do not send DHCP messages will not have their information added.
Therefore, options B and C are correct. Options A and D are not correct because performing a DHCPRELEASE would simply remove an existing entry from the database1, and Dynamic ARP inspection (DAI) uses the information stored in the DHCP snooping binding database but does not prevent entries from being created1.

NEW QUESTION # 74
Which two elements are used to create the STP bridge ID? (Choose two.)
  • A. the bridge priority value
  • B. the root port number
  • C. the port cost
  • D. the system MAC address
Answer: A,D

NEW QUESTION # 75
......
The Juniper JN0-351 certification exam is one of the hottest and career-oriented certifications in the market. This Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) certification exam has been inspiring beginners and experienced professionals since its beginning. Over this long time period, countless Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) exam candidates have passed their Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) certification exam, and now they are offering their services to the top world brands.
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