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>> Valid JN0-650 Exam Questions <<
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NEW QUESTION # 35
You need to perform maintenance on one of your OSPF routers. You do not want the other OSPF routers on the network to forward traffic to this router during the maintenance window. Which OSPF configuration parameter would you implement to accomplish this task?
Answer: D
Explanation:
Configuring the overload parameter on an OSPF router tells other routers in the area to temporarily avoid using this router as a transit path. This allows maintenance to be performed without disrupting traffic flow, as OSPF will continue routing around the overloaded router.
NEW QUESTION # 36
Exhibit.
You have determined that traffic in your network is being routed through your route reflector instead of using the optimal path. Referring to the exhibit, what are two configuration changes on the route reflector that would solve the problem? (Choose two.)
Answer: A,B
Explanation:
The exhibit shows a BGP Route Reflector (RR) configuration where an export policy named NHS (Next-Hop Self) is applied to the internal BGP group int-group. The policy NHS sets the next-hop self attribute for BGP routes.
* The Problem (Traffic Tromboning):In a standard BGP Route Reflector design, the RR should reflect routes without modifying the BGP next-hop attribute. By applying a next-hop self policy on the export to clients, the RR tells all its clients thatitis the exit point for those routes. Consequently, all data plane traffic is sent to the RR first before being forwarded to the actual destination, rather than following the optimal direct path between clients. This is known as "traffic tromboning" or suboptimal routing.
* The Solution (Option C):The most direct way to fix this is todelete the export policythat is forcing the next-hop to be the RR. By deleting protocols bgp group int-group export NHS, the RR will resume standard behavior and reflect the original next-hop received from the route source, allowing clients to route traffic directly to the correct destination.
* The Refined Solution (Option D):If you must keep the NHS policy (perhaps for routes learned from external peers), you should ensure it only applies to those specific routes. By adding from route-type internal to the policy term and then potentially changing the logic (or simply narrowing the scope), you can prevent the RR from incorrectly applying next-hop self to internal routes that it is merely reflecting.
In the context of this specific problem,Option Dcombined with a change in the policy's action or scope helps ensure reflected internal routes maintain their original, optimal next-hops.
* Option Ais incorrect because setting next-hop self for external routes is common practice, but it doesn't solve the problem of internal reflected routes being diverted to the RR.
* Option Bis incorrect because applying this as an import policy would change how the RR itself sees the routes, but it wouldn't fix the attributes being sent out to the clients in the reflection process.
NEW QUESTION # 37
You are deploying a new campus switching environment using EX Series switches. This new environment includes IP phones requiring Power over Ethernet (PoE) and end-user client PCs attached to a single switch port that will be configured with 802.1X authentication.
Considering the default configuration on an EX Series access switch and the configuration requirements to support this deployment, which two statements are correct? (Choose two.)
Answer: A,B
Explanation:
In a standard campus deployment on Juniper EX Series switches involving VoIP phones and 802.1X authentication, understanding the default behavior of Junos OS 24.4 is critical:
* Voice VLAN (Option A): By default, an access port belongs to a single VLAN (the native or data VLAN). For an IP phone to operate correctly on the same physical port as a PC, a Voice VLAN must be explicitly configured and associated with the interface. This allows the switch to segregate voice traffic (usually tagged) from data traffic (untagged).
* 802.1X Configuration (Option D): Access ports do not have 802.1X authentication enabled by default. To enforce network access control for the client PCs, you must manually enable and configure the dot1x protocol on all relevant interfaces.
* PoE Default (Option B): On EX Series switches that support PoE (like P or MP models), PoE is enabled by default on all PoE-capable ports. Therefore, additional configuration is generally not required unless you need to change power priorities or management modes.
* LLDP Default (Option C): Standard LLDP is typically enabled by default in the factory configuration of most EX Series switches to facilitate neighbor discovery. While LLDP-MED is used for VoIP, the core requirement for "deploying" the described environment highlights the manual steps of VLAN and security setup rather than protocol discovery which often runs out-of-the-box.
NEW QUESTION # 38
When configuring routing policy for IGPs, which Junos policy framework would you use?
Answer: A
NEW QUESTION # 39
While deploying class of service on an EX Series switch, what are two aspects of the scheduler?
(Choose two.)
Answer: C,D
Explanation:
In Junos CoS, a scheduler is associated with a forwarding class queue and is responsible for:
Identifying the priority of the queue, determining how traffic is scheduled relative to other queues.
Defining the buffer size allocated to the queue, which controls how much traffic the queue can hold before drops occur.
Schedulers do not perform rate-limiting or DSCP translation directly; those functions are handled by policers and classifiers.
NEW QUESTION # 40
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