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>> Simulation JN0-650 Questions <<
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NEW QUESTION # 112
You have multiple BGP routes to the same prefix with equal local-preference values and AS-path lengths.
In this scenario, which route will be preferred in the route selection process?
Answer: D
NEW QUESTION # 113
You want to implement a system in your network to simplify VLAN management that can also dynamically create and prune VLANs. How would you accomplish this task?
Answer: D
Explanation:
To simplify VLAN management and automate the creation and pruning of VLANs across a network, Juniper utilizes theMultiple VLAN Registration Protocol (MVRP).
* MVRP on Trunk Interfaces (Option C):MVRP is the IEEE 802.1ak standard that replaces the older, proprietary GVRP. It is designed to run ontrunk interfacesbetween switches.
* Dynamic Creation:When a VLAN is added to one switch, MVRP advertises its existence to neighboring switches. If those switches need to reach that VLAN, they can dynamically create it in their database.
* Pruning:If a switch no longer has any active ports or downstream neighbors interested in a specific VLAN, it stops advertising that VLAN on its trunks. This "prunes" the VLAN traffic from those links, saving bandwidth.
* Incorrect Options:Option A and Bare incorrect because GVRP is legacy and no longer the recommended protocol for modern Junos deployments.Option Dis incorrect because MVRP is meant for inter-switch trunk links to manage the fabric, not for edge access ports where VLAN membership is usually static.
NEW QUESTION # 114
Exhibit
You are receiving the same BGP Internet routes on R1 from both upstream ISPs. You are asked to load- balance traffic destined to the Internet across both ISPs.
Referring to the exhibit, which BGP solution should you use?
Answer: A
Explanation:
In standard BGP operations, a router typically selects only one "best path" for a given destination prefix and installs that single path into the forwarding table. To utilize multiple paths for traffic forwarding (load- balancing), specific multipath features must be enabled.
* BGP Multipath:This feature allows a router to install multiple equal-cost paths into the routing and forwarding tables. However, by default, BGP multipath requires that all candidate paths have the same neighboring Autonomous System (AS).
* Multipath Multiple-AS (Option B):In the exhibit, R1 is receiving routes fromISP A (AS 65501)and ISP B (AS 65502). Since these are two different neighboring ASs, the standard multipath feature is not sufficient. You must use the multipath multiple-as statement under the BGP group or neighbor hierarchy. This tells Junos to consider paths as equal even if they originate from different neighboring ASs, provided all other BGP path selection attributes (Local Preference, AS Path length, Origin, MED, etc.) are identical.
* Why other options are incorrect:*Option A (multihop)is used for peering with routers that are not directly connected.
* Option C (prefix limit)is a security and stability feature to limit the number of prefixes received from a neighbor.
* Option D (damping)is used to penalize unstable, "flapping" routes to prevent constant routing table churn.
Configuration Example for Junos OS 24.4:To implement this on R1, you would use the following configuration:
set protocols bgp group <group-name> multipath multiple-as
NEW QUESTION # 115
Exhibit
As shown in the exhibit, you have implemented CoS classifiers using Differentiated Services Code Point (DSCP) In this scenario, which two statements are correct? (Choose two.)
Answer: C,D
NEW QUESTION # 116
Exhibit
You need to configure the non-RP routers in your network to dynamically learn the location of the RP using standard protocols only. You have already applied the configuration shown in the exhibit, but the routers have not learned the location of the RP.
Which additional step must you take to fulfill these requirements?
Answer: D
Explanation:
The exhibit shows a multicast network running PIM Sparse Mode where R2 is configured as a local Rendezvous Point (RP). However, the non-RP routers (like R5) show no learned RP in their show pim rps output. To resolve this using standard protocols for dynamic RP discovery, you must implement a mechanism that automates the distribution of RP information across the PIM domain.
Bootstrap Router (BSR) (Option B): BSR is the industry-standard (RFC 5059) mechanism for dynamically electing an RP and distributing that information throughout a PIM-SM domain.
It uses two roles: Candidate-RPs (C-RPs), which announce their desire to be an RP, and Candidate-BSRs (C- BSRs), which collect these announcements and flood them to all other routers in the network via PIM bootstrap messages.
BSR is a " standard protocol " as it is part of the PIMv2 specification. Once configured on R2 (as C-RP) and potentially R1 or R2 (as C-BSR), all other routers will dynamically learn that R2 is the RP for the specified group ranges.
Auto-RP (Option D): While this also provides dynamic RP discovery, it is a proprietary Cisco protocol.
Although Junos supports it for interoperability, the question specifically asks for " standard protocols only, " making BSR the preferred choice.
MSDP (Option A): Multicast Source Discovery Protocol (MSDP) is used to share information about active sources between different PIM domains or for Anycast-RP. It does not handle the initial discovery of an RP within a single domain for standard PIM-SM operations.
Anycast RP (Option C): This is a technique used for RP redundancy and load balancing. While it can use BSR or MSDP for synchronization, it is a design architecture rather than a standalone " standard protocol " for the basic dynamic discovery of an RP in the manner requested here.
Configuration Example for BSR in Junos OS 24.4: To enable this, you would add the following to the RP (R2):
set protocols pim rp bootstrap-discovery
set protocols pim rp candidate-rp 10.222.1.2 group-ranges 224.0.0.0/4
set protocols pim rp candidate-bsr 10.222.1.2
NEW QUESTION # 117
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