PDF Download Free of JN0-650 Valid Practice Test Questions
JN0-650 Test Engine files, JN0-650 Dumps PDF
Juniper JN0-650 Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
NEW QUESTION # 24
You have configured CoS on a Junos device. A packet is classified as best effort by a behavior aggregate (BA) classifier, and as expedited forwarding by a multifield (MF) classifier.
Which statement is true in this scenario?
- A. The packet will be placed into the queue that has the most bandwidth assigned to it.
- B. The packet will be placed in a queue associated with the MF classifier.
- C. The packet will be placed in a queue associated with the BA classifier.
- D. The packet will be placed into the queue which is least congested.
Answer: B
NEW QUESTION # 25
The network you support currently has a mixture of MC-LAG and Virtual Chassis being used to provide redundant connectivity from various IDFs. A project to modernize the architecture and move to EVPN- VXLAN using ESI-LAG will be starting soon. You want to avoid IDFs losing connectivity as the core devices are migrated to EVPN-VXLAN. Which action will accomplish this task?
- A. Enable EVPN-VXLAN on the leaf devices before starting the migration.
- B. Remove the links between the MC-LAG leaf devices and disable Virtual Chassis.
- C. Enable network-isolation-profile on the leaf devices.
- D. Enable no-core-isolation on the core devices.
Answer: D
NEW QUESTION # 26
Exhibit:
You are configuring dynamic rendezvous points for your PIM multicast domain. You have chosen to use auto-RP as the dynamic RP mechanism. You are not seeing the auto-RP announcements. Referring to the exhibit, which two configurations will solve this problem? (Choose two.)
- A. Configure the interfaces for sparse-dense mode.
- B. Configure the dense-groups for addresses 224.0.1.39 and 224.0.1.40.
- C. Configure the rp for the mapping function.
- D. Configure the interfaces for sparse mode.
Answer: A,B
NEW QUESTION # 27
For what purpose is the 'override-metric' used in an OSPF configuration on a Junos device?
- A. To set a fixed metric for all OSPF routes.
- B. To change the metric of OSPF routes during redistribution.
- C. To modify the default metric for a specific OSPF interface.
- D. To influence the OSPF route selection process.
Answer: C
NEW QUESTION # 28
Which EVPN route type is used for fast convergence and for advertising the split horizon label?
- A. Type 4
- B. Type 2
- C. Type 1
- D. Type 5
Answer: C
NEW QUESTION # 29
Which two statements are true regarding hierarchical queuing? (Choose two.)
- A. VLANs take precedence over interface sets for port bandwidth.
- B. Queuing resources are assigned through a traffic control profile applied to a logical interface.
- C. VLANs and interface sets share port bandwidth.
- D. Queuing resources are assigned through a scheduler applied to a logical interface.
Answer: B,C
NEW QUESTION # 30
Which step comes first in the BGP route selection process after next-hop reachability is verified?
- A. BGP selects the route with the highest MED value.
- B. Compare Local Preference values (highest preferred).
- C. BGP always prefers eBGP learned routes over iBGP learned routes.
- D. BGP prefers routes from the router with the highest IP address.
Answer: B
NEW QUESTION # 31
How does Source-Specific Multicast (SSM) differ from Any-Source Multicast (ASM)?
- A. SSM requires an RP for multicast group communication, while ASM does not.
- B. ASM is used for one-to-many communications, while SSM is used for many-to-many.
- C. ASM uses IGMPv3, while SSM uses IGMPv2.
- D. SSM allows receivers to join multicast groups from specific sources, while ASM allows from any source.
Answer: D
NEW QUESTION # 32
You have configured a switch with persistent MAC learning on the ports.
Which two statements are true? (Choose two.)
- A. The switch remembers the MAC addresses of devices learned on each port even if the switch reboots.
- B. If you move a device to a different port on the switch, it will be able to connect as long as the original port is active.
- C. If you move a device to a different port on the switch, it will be able to connect as long as the original port is not active.
- D. The switch remembers the MAC addresses of devices learned on each port until the switch reboots.
Answer: A,C
NEW QUESTION # 33
Which BGP attribute is used to ensure loop-free interdomain routing?
- A. Weight
- B. AS Path
- C. Local Preference
- D. MED
Answer: B
NEW QUESTION # 34
In Junos, which configuration statement is used to enable IGMP snooping on a switch?
- A. set routing-options multicast
- B. set protocols bgp group external
- C. set protocols ospf area 0.0.0.0
- D. set protocols igmp-snooping vlan all
Answer: D
NEW QUESTION # 35
You must implement EVPN signaling on an EX Series device that is configured with both underlay and overlay networks. Which network protocol accomplishes this task?
- A. IS-IS underlay network
- B. MPLS overlay network
- C. EBGP overlay network
- D. OSPF underlay network
Answer: C
Explanation:
In an EVPN-VXLAN architecture, the network is divided into two distinct planes: the Underlay and the Overlay.
Underlay (IP Fabric): The underlay ' s only job is to provide IP reachability between the loopback addresses of all VTEPs (Virtual Tunnel Endpoints). This is typically achieved using OSPF, IS-IS, or EBGP.
Overlay (EVPN Control Plane): The overlay is responsible for carrying Layer 2 MAC and Layer 3 IP reachability information between switches. EVPN signaling is the standard mechanism for this task.
Protocol Choice (Option D): EVPN uses MP-BGP (Multiprotocol BGP) as its control plane protocol. On Juniper EX Series and QFX Series switches, the most scalable and recommended design for the overlay is EBGP (External BGP).
In a 3-stage or 5-stage Clos architecture, EBGP is used in the overlay to exchange EVPN routes (Route Types
1-5) between Leaf and Spine switches.
EBGP simplifies configuration by avoiding the need for Route Reflectors (required for IBGP) and provides better control over route propagation through BGP community and policy management.
Incorrect Options:
Options A and B refer to the underlay protocols. While they provide the path for the VXLAN tunnels, they do not handle the EVPN signaling itself.
Option C (MPLS) is a different transport technology. While EVPN can run over MPLS (EVPN-MPLS), campus designs on EX series devices specifically use VXLAN as the data plane, making EBGP the standard signaling protocol for the EVPN-VXLAN overlay.
NEW QUESTION # 36
Exhibit
You want to provide better performance for the video traffic that traverses your network The video traffic enters your network without any class-of-service markings According to Juniper Networks, which two classification methods are performed by the routers shown in the exhibit? (Choose two.)
- A. R1 performs multifield classification.
- B. R2 and R3 perform behavior aggregate classification
- C. R1 performs behavior aggregate classification.
- D. R2 and R3 perform multifield classification
Answer: A,B
Explanation:
The exhibit illustrates a standard end-to-end Class of Service (CoS) path consisting of an edge router (R1) and core/intermediate routers (R2 and R3).
* Edge Classification (Option B):The scenario specifies that video traffic enters the networkwithout any class-of-service markings. Because there are no DSCP or 802.1p bits to inspect, the ingress router (R1) cannot use simple Behavior Aggregate (BA) classification. Instead, it must useMultifield (MF) classification. MF classification allows the router to look deeper into the packet (Source/Destination IP, Protocol, Port numbers) to identify the video stream and assign it to a specific forwarding class. *Core Classification (Option D):Once R1 has identified the traffic, it will typically apply arewrite ruleon its egress interface to mark the packets with a specific CoS value (like a DSCP code). Consequently, the downstream routers (R2 and R3) do not need to perform expensive deep-packet inspection again. They can useBehavior Aggregate (BA) classification, which simply looks at the markings in the packet header to determine the appropriate forwarding priority.
* Option A and C:These are incorrect because BA classification is impossible on unmarked ingress traffic, and performing MF classification in the core is inefficient and not a recommended Juniper design practice for high-speed transit.
NEW QUESTION # 37
You have a workstation and a VoIP phone connected to port ge-0/0/1 on an access switch.
Referring to the exhibit, which two statements are true? (Choose two.)
- A. All frames that exit interface ge-0/0/1 will belong to the data VLAN.
- B. Voice frames that enter interface ge-0/0/1 will be forwarded as expedited forwarding traffic.
- C. Frames that exit interface ge-0/0/1 on the data VLAN will be tagged.
- D. The phone will automatically be assigned a VLAN ID.
Answer: B,D
NEW QUESTION # 38
Click the Exhibit button.
You are troubleshooting suboptimal routing in an enterprise OSPFv2 deployment:
-- R1 is an ABR between Area 0 and Area 1.
-- R2 is an ABR between Area 0 and Area 2.
-- R3 in Area 1 advertises a network that should be reachable by routers in Area 2.
-- The ABRs are connected in the backbone (Area 0).
On router R2, the show ospf database does not display router LSAs or network LSAs from Area 1, but an interarea route to R3's network exists in the routing table. R2 does not have Type-1 or Type-2 LSAs from Area 1 in its OSPF database.
Referring to the exhibit, which statement is correct?
- A. Junos disables Type-1 and Type-2 LSAs by default in Interarea LSDBs.
- B. R2 is filtering them using the OSPF import policy.
- C. R2 is running OSPFv3, which does not use Type-1 or Type-2 LSAs.
- D. Type-1 and Type-2 LSAs are summarized into Type-3 LSAs by ABRs and do not cross area boundaries.
Answer: D
Explanation:
The behavior described is the fundamental operational principle of OSPF ' s hierarchical area structure.
* LSA Flooding Scope: In OSPFv2, Type-1 (Router) and Type-2 (Network) Link-State Advertisements (LSAs) are restricted to a local area flooding scope . They contain detailed topology information (such as which routers are connected to which links) that is only relevant for calculating the Shortest Path First (SPF) tree within that specific area.
* ABR Functionality: Area Border Routers (ABRs), such as R1 in this scenario, act as the gateway between areas. The ABR does not forward Type-1 or Type-2 LSAs from one area to another. Instead, it extracts the prefix information (the network address and mask) from those LSAs and generates a Type-
3 (Summary) LSA .
* Interarea Reachability: This Type-3 LSA is then flooded into the backbone (Area 0) and subsequently into other non-backbone areas, such as Area 2. This explains why R2 sees an " interarea route " to R3's network in its routing table and has the corresponding Type-3 LSA in its database, but cannot see the original Type-1 or Type-2 LSAs from Area 1.
* Why other options are incorrect: Option A is incorrect because this is standard protocol behavior, not the result of a manual filter. Option B is incorrect as there is no such " disable " feature; the protocol design inherently prevents these LSAs from crossing boundaries. Option C is incorrect because OSPFv3 still uses Type-1 and Type-2 LSAs (renamed but functionally similar for topology), and the prompt specifically identifies the deployment as OSPFv2 .
NEW QUESTION # 39
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?
- A. Configure BSR.
- B. Configure Auto-RP
- C. Configure Anycast RP.
- D. Configure MSDP.
Answer: A
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 # 40
Exhibit:
The policy shown in the exhibit is applied as an export policy to your BGP neighborship. Which action will be taken for route 12.233.45.5?
- A. It will be accepted by term 1.
- B. It will be evaluated by the next policy.
- C. It will be accepted by the default policy.
- D. It will rejected by term 2.
Answer: A
NEW QUESTION # 41
......
Pass Your JNCIS-ENT JN0-650 Exam on Mar 20, 2026 with 72 Questions: https://exampdf.dumpsactual.com/JN0-650-actualtests-dumps.html
