JN0-351 Latest Material: Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Braindump JN0-351 Pdf Pass for sure

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Juniper JN0-351 Exam Syllabus Topics:

Section	Objectives
Layer 2 Switching or VLANs	- Configuration, monitoring, and troubleshooting - Ports and tagging - Frame processing - Native VLANs and voice VLANs - Inter-VLAN routing - Bridging components - VLAN concepts and functionalities
IS-IS	- IS-IS configuration and troubleshooting
OSPF	- OSPF configuration and troubleshooting
Spanning Tree Protocol	- Convergence issues identification - STP topology design and troubleshooting - Port roles interpretation - Bridge priority and port cost optimization - Loop prevention and redundancy
BGP	- BGP configuration and troubleshooting
Protocol Independent Routing	- Routing fundamentals
Tunnels	- Tunnel technologies
Layer 2 Security	- Port security implementation - Dynamic ARP inspection - DHCP snooping - Common Layer 2 attack mitigation
High Availability	- VRRP and redundancy protocols - High availability design and integration

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q69-Q74):

NEW QUESTION # 69
Click the Exhibit button.

R1 was started at 4:00 PM. R2 and R3 were started at 6:00 PM. R4 was started at 10:00 PM. All routers are in Area 0 and there are no point-to-point links.
Referring to the exhibit, which router is the designated router?

A. R3
B. R1
C. R4
D. R2

Answer: C

NEW QUESTION # 70
Which statement is correct about the storm control feature?

A. The storm control configuration only applies to traffic being sent between the forwarding and control plane.
B. The storm control feature requires a special license on EX Series switches.
C. The storm control feature is not supported on aggregate Ethernet interfaces.
D. The storm control feature is enabled in the factory-default configuration on EX Series switches.

Answer: D

Explanation:
Option A is correct. The storm control feature is enabled in the factory-default configuration on EX Series switches12. On EX2200, EX3200, EX3300, EX4200, and EX6200 switches, the factory default configuration enables storm control for broadcast and unknown unicast traffic on all switch interfaces2. On EX4300 switches, the factory default configuration enables storm control on all Layer 2 switch interfaces1.
Option B is incorrect. The storm control feature does not require a special license on EX Series switches34.
Option C is incorrect. There's no information available that suggests the storm control feature is not supported on aggregate Ethernet interfaces.
Option D is incorrect. The storm control configuration applies to traffic at the ingress of an interface5, not just between the forwarding and control plane.

NEW QUESTION # 71
Which statement is correct about graceful Routing Engine switchover (GRES)?

A. GRES has a helper mode and a restarting mode.
B. When combined with NSR, routing is preserved and the new master RE does not restart rpd.
C. The PFE restarts and the kernel and interface information is lost.
D. With no other high availability features enabled, routing is preserved and the new master RE does not restart rpd.

Answer: B

Explanation:
The Graceful Routing Engine Switchover (GRES) feature in Junos OS enables a router with redundant Routing Engines to continue forwarding packets, even if one Routing Engine fails.
GRES preserves interface and kernel information, ensuring that traffic is not interrupted.
However, GRES does not preserve the control plane.
To preserve routing during a switchover, GRES must be combined with either Graceful Restart protocol extensions or Nonstop Active Routing (NSR). When GRES is combined with NSR, nearly
75 percent of line rate worth of traffic per Packet Forwarding Engine remains uninterrupted during GRES. Any updates to the primary Routing Engine are replicated to the backup Routing Engine as soon as they occur.
Therefore, when GRES is combined with NSR, routing is preserved and the new master RE does not restart rpd.

NEW QUESTION # 72
You implemented the MAC address limit feature with the shutdown action on all interfaces on your switch.
In this scenario, which statement is correct when a violation occurs?

A. By default, devices that are learned before the violation occurs are still allowed to send and receive traffic through the specific interface.
B. By default, the interface will continue to send and receive traffic for all connected devices after a violation has occurred.
C. By default, you must manually clear the violation for the interface to send and receive traffic again.
D. By default, the violation will automatically be cleared after 300 seconds and the interface will resume sending and receiving traffic for all learned devices.

Answer: C

Explanation:
Explanation
When the MAC address limit feature with the shutdown action is implemented on a switch, if a violation occurs, the interface is disabled and a system log entry is generated1. If the switch has been configured with the port-error-disable statement, the disabled interface recovers automatically upon expiration of the specified disable timeout1. However, if the switch has not been configured for auto-recovery from port error disabled conditions, you must manually clearthe violation by running the clear ethernet-switching port-error command for the interface to send and receive traffic again1. This explanation is based on the Enterprise Routing and Switching Specialist (JNCIS-ENT) documents and learning resources available at Juniper Networks1.

NEW QUESTION # 73
Which two statements about BGP facilitate the prevention of routing loops within an autonomous system? (Choose two.)

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

Answer: A,D

NEW QUESTION # 74
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