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| Section | Objectives |
|---|---|
| Layer 2 Switching Technologies | - Spanning Tree Protocol (STP/RSTP/MSTP) - Ethernet switching concepts - VLANs and trunking |
| Network Services | - NAT concepts in Junos - Basic multicast concepts |
| Routing Protocols | - IS-IS overview - OSPF configuration and troubleshooting - BGP fundamentals and policy control |
| High Availability | - VRRP configuration and behavior - Redundancy concepts in enterprise networks |
| Routing Policy and Filtering | - Policy statements - Route filtering and preference control |
| Operations and Troubleshooting | - Junos CLI monitoring tools - Troubleshooting routing and switching issues |
The main key to passing the JN0-352 exam is to use your time affectionately and grasp every topic so you can attempt the maximum number of questions in the actual JN0-352 Exam. By studying the questions mentioned in the prep material, the candidates have control over the exam anxiety in no time.
NEW QUESTION # 109
What is a purpose of using a spanning tree protocol?
Answer: B
Explanation:
A broadcast storm is a network condition where a large number of broadcast packets are sent and received by multiple devices, causing congestion and performance degradation. A broadcast storm can occur when there are loops in the network topology, meaning that there are multiple paths between two devices.
A spanning tree protocol is a network protocol that prevents loops from being formed when switches or bridges are interconnected via multiple paths. It does this by creating a logical tree structure that spans all the devices in the network, and disabling or blocking the links that are not part of the tree, leaving a single active path between any two devices.
By eliminating loops, a spanning tree protocol also eliminates broadcast storms, as broadcast packets will not be forwarded endlessly along the looped paths. Instead, broadcast packets will be sent only along the tree structure, reaching each device once and avoiding congestion.
NEW QUESTION # 110
Which statement is correct about the IS-IS ISO NET address?
Answer: B
Explanation:
An ISO NET address is a type of network address used by the IS-IS routing protocol. It identifies a point of connection to the network, such as a router interface, and is also called a Network Service Access Point (NSAP).
An ISO NET address consists of three parts: an area ID, a system ID, and a selector. The area ID identifies the IS-IS area to which the device belongs. The system ID uniquely identifies the device within the area. The selector identifies a specific service or function on the device, such as routing or management.
An ISO NET address must be unique for each device in the network, because it is used by IS-IS to establish adjacencies, exchange routing information, and compute shortest paths. If two devices have the same ISO NET address, they will not be able to communicate with each other or with other devices in the network. Therefore, it is important to assign different ISO NET addresses to each device in the network.
NEW QUESTION # 111
What are two reasons for creating multiple areas in OSPF? (Choose two.)
Answer: A,B
Explanation:
Option A is correct. Creating multiple areas in OSPF can help to reduce the convergence time .
This is because changes in one area do not affect other areas, so fewer routers need to run the SPF algorithm in response to a change.
Option D is correct. Creating multiple areas in OSPF can help to reduce Link State Advertisement (LSA) flooding across the network. This is because LSAs are not flooded out of their area of origin.
NEW QUESTION # 112
What is the purpose of the native VLAN feature on the Juniper Networks EX Series Switches?
Answer: C
Explanation:
A native VLAN is a trunk-port concept, not an access-port concept. On an 802.1Q trunk, every frame is normally expected to carry a VLAN tag identifying its membership; the native VLAN is the single exception that Junos permits an administrator to define using the native-vlan-id statement under the trunk interface's family ethernet-switching hierarchy. Any untagged frame arriving on that trunk port is automatically classified into the configured native VLAN, and conversely, outbound frames belonging to the native VLAN are transmitted untagged rather than with an 802.1Q header. This behavior exists chiefly for interoperability with legacy or third-party devices that either cannot generate 802.1Q tags or intentionally send management or default traffic untagged across an otherwise tagged trunk. Access ports, by definition, only ever carry a single VLAN's traffic and never receive tagged frames in normal operation, so the native VLAN mechanism has no relevance there -- which eliminates the access-port-oriented answer choices.
The native VLAN also does not restrict a trunk to a single VLAN; the trunk continues to carry all configured tagged VLANs simultaneously, with the native VLAN simply being the designated untagged exception. Misconfiguring or mismatching native VLAN IDs between two trunk peers is a classic Layer 2 troubleshooting scenario on the exam.
NEW QUESTION # 113
In a LAN segment, which tie-breaker would spanning tree consider if equal-cost paths exist between two or more switches to the root bridge?
Answer: D
NEW QUESTION # 114
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