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| Section | Weight | Objectives |
|---|---|---|
| High Availability and Resiliency | 5-10% | - Network resiliency design and troubleshooting - Graceful restart and non-stop routing - Redundancy protocols and failover mechanisms |
| Layer 2 Switching and VLANs | 15-20% | - VLAN concepts, configuration, trunking and tagging - Link Aggregation Groups (LAG) and Virtual Chassis - Spanning Tree Protocol (STP, RSTP, MSTP) operation and configuration |
| BGP | 15-20% | - Route advertisement, attributes and path selection - Neighbor relationships and session establishment - Routing policies, filtering and common troubleshooting |
| Protocol Independent Routing | 10-15% | - Routing instances and route selection criteria - Routing tables, static routes and route preference - Basic routing policy and filter operation |
| OSPF | 15-20% | - Neighbor formation, area design and LSA types - Route summarization and redistribution - Configuration, verification and troubleshooting |
| IP Multicast | 5-10% | - Multicast routing monitoring and troubleshooting - IGMP operation and configuration - PIM Dense Mode, Sparse Mode and RP mechanisms |
| Layer 2 Security | 10-15% | - DHCP snooping, Dynamic ARP Inspection and IP Source Guard - Layer 2 firewall filters and security features - Port security, MAC limiting and storm control |
| IS-IS | 10-15% | - Adjacency establishment, levels and metrics - Configuration and route exchange - Scalable enterprise deployment and troubleshooting |
| Tunnels and Overlays | 5-10% | - GRE, IP-IP and dynamic tunnel configuration - Tunnel types, encapsulation and operation - Overlay network design and connectivity |
>> JN0-352 Test Lab Questions <<
In the Juniper JN0-352 Dumps PDF format of Itcerttest, the questions are very relevant to the actual Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-352) exam. The Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-352) dumps PDF format is appropriate for laptops, smartphones, and tablets. As the JN0-352 PDF questions file is portable, you can easily study via it anywhere. You can also print these Juniper PDF Dumps. Itcerttest regularly updates its Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-352) questions PDF file to improve the questions and introduce changes when required.
NEW QUESTION # 175
Referring to the output shown in the exhibit, which statement is correct?
Answer: B
NEW QUESTION # 176 
Click the Exhibit button.
You run the show ospf database command and you see a Router LSA marked with an asterisk.
Referring to the exhibit, what is the significance of this result?
Answer: C
Explanation:
In the output of show ospf database, Junos marks every self-originated link-state advertisement with an asterisk immediately preceding the LSA's link-state ID. A self-originated LSA is one that was created and flooded by the router on which the command is being executed, as opposed to an LSA that was received from and originated by a neighboring router elsewhere in the area. In this exhibit, the asterisked Router LSA has an ID of 10.101.100.0 and an Advertising Router value of the same 10.101.100.0, confirming that this particular Router LSA describes the local device's own links, area membership, and interface costs, and that the local router itself flooded this LSA into the area's link-state database. This distinction matters operationally because when troubleshooting OSPF topology or SPF calculation issues, engineers frequently need to isolate their own router's advertised state from the states advertised by every other router in the area; the asterisk provides an immediate, unambiguous visual cue for that separation without needing to cross-reference the router's own ID separately. It has no relationship to designated router or backup designated router status - DR/BDR roles are indicated elsewhere in interface-level output, not through the asterisk convention in the LSA database dump, and a router that is neither DR nor BDR still self-originates and flags its own Router LSA the same way.
Reference topics: Junos Enterprise Routing - OSPF, Interpreting the OSPF Link-State Database.
NEW QUESTION # 177
A Juniper Networks EX Series Switch has storm control enabled on all interfaces. The ge-0/0/1 interface carrying several VLANs hits its storm control limit and is shut down.
In this scenario, which command allows you to manually clear the violation?
Answer: B
Explanation:
When storm control on an EX Series switch is configured with an action of interface-shutdown (rather than the default of simply dropping excess traffic), exceeding the configured bandwidth threshold for broadcast, multicast, or unknown-unicast traffic causes Junos to administratively disable the offending interface to protect the rest of the switching fabric. Recovery from this condition can happen automatically if a recovery- timeout interval has been configured, but when immediate manual recovery is required, the operational command clear ethernet-switching recovery-timeout interface interface-name explicitly clears the storm- control-triggered violation and re-enables the port without waiting for the timer to expire. This command is purpose-built for this exact condition and is distinct from more general troubleshooting commands: clear ethernet-switching table purges the learned MAC address database and has no bearing on a storm-control- disabled port; clear interface statistics resets traffic counters for diagnostic baselining but does not touch administrative state; and clear log messages simply flushes the local system log buffer. Administrators should also verify the underlying cause of the storm - a switching loop, a misbehaving host, or a misconfigured device - before manually clearing the condition, since without addressing the root cause the port is likely to trip again. This command and workflow are commonly tested as part of the Layer 2 security and resiliency features on EX platforms. Reference topics: Junos Enterprise Switching - Storm Control and Port Security, Recovering Interfaces Disabled by Storm Control.
NEW QUESTION # 178
Which two statements are true about high availability on Junos devices? (Choose two.)
Answer: C,D
NEW QUESTION # 179 
You need to apply a Layer 2 firewall filter on a Juniper Networks EX Series Switch to block traffic from the source MAC address 00:12:34:56:00:07 entering the switch on ge-0/0/3. After committing the configuration, traffic from the MAC address still passes through.
Referring to the exhibit, which statement is correct in this scenario?
Answer: D
Explanation:
The intent of this filter is to match and discard traffic from one single, specific host MAC address, which requires the source-mac-address match condition to reference the complete, exact 48-bit address using an explicit /48 mask (or no mask at all, which Junos treats as an implicit full match) so that only that one precise address is matched. As configured, the term instead specifies a /40 mask on 00:12:34:56:00:07, meaning only the first 40 bits (the first five octets, 00:12:34:56:00) are actually significant to the match, while the sixth octet is effectively wildcarded across its full range; this produces an imprecise, overly broad match criterion rather than the single-host match the administrator intended, and is a common configuration mistake that undermines the predictability and correctness of MAC-based filtering. The lesson tested here is that source and destination MAC address match conditions in Junos firewall filters must be specified with the correct, deliberate, and explicit prefix length appropriate to the intended scope - typically /48 for a single exact host
- rather than an arbitrary or miscalculated mask value. Firewall filters under family ethernet-switching are fully capable of matching on both source-mac-address and destination-mac-address, which rules out that option entirely. Layer 2 MAC-based filters function correctly on both access and trunk interface modes, so interface type is not a limiting factor here. There is no indication in the exhibit that the filter's application direction (input versus output) is reversed. Reference topics: Junos Enterprise Switching - Layer 2 Security, MAC Address Match Conditions and Prefix Length Precision.
NEW QUESTION # 180
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