Latest JN0-650 Exam Dumps Juniper Exam from Training Expert Pass4cram
Pass Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) PDF Dumps | Recently Updated 72 Questions
Juniper JN0-650 Exam Syllabus Topics:
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NEW QUESTION # 15
Your OSPF network consists of a mix of 1GbE and 10GbE interfaces. By default, all interfaces have the same cost in your OSPF network. You are asked to ensure that the 10GbE interfaces are more preferred when available In this scenario, which two statements would accomplish this behavior? (Choose two.)
- A. You should manually assign the interface metric for each 10GbE interface to be higher than the 1GbE interfaces in your OSPF network.
- B. You should manually assign the interface metric for each 1GbE interface to be higher than the 10GbE interfaces in your OSPF network.
- C. You should define the reference bandwidth as 10G. which will assign the 1GbE interfaces a higher cost
- D. You should define the reference bandwidth as 1G. which will assign the 1GbE interfaces a higher cost.
Answer: B,C
Explanation:
OSPF determines the best path to a destination by calculating themetric (cost)of each link. By default, Junos OS uses areference bandwidthof100 Mbpsto calculate this cost using the formula:
When the reference bandwidth is left at the default 100 Mbps, any interface with a speed of 100 Mbps or higher (including 1 GbE and 10 GbE) is assigned a cost of1because the minimum OSPF cost is 1. This results in equal-cost paths, preventing the router from preferring the faster 10 GbE link.
To ensure 10 GbE interfaces are preferred, you must create a cost differential:
* Option A (Reference Bandwidth):By increasing the reference bandwidth to10G(or higher), the calculation changes. For a 10 GbE link, the cost becomes $10,000 / 10,000 = 1$. For a 1 GbE link, the cost becomes $10,000 / 1,000 = 10$. Since OSPF prefers the path with thelowest cumulative cost, the
10 GbE link is now preferred.
* Option D (Manual Metric):You can manually override the automatic cost calculation by assigning a higher metric specifically to the 1 GbE interfaces. If a 1 GbE interface is manually set to a cost of 50 and the 10 GbE interface remains at 1 (or is set to a lower value), the router will prioritize the 10 GbE path.
Option Bis incorrect because a higher metric makes a pathlesspreferred.Option Cis incorrect because a 1G reference bandwidth would still result in both 1 GbE and 10 GbE interfaces having a cost of 1.
NEW QUESTION # 16
Exhibit
You configured MVRP in your Layer 2 network using the configuration shown in the exhibit. You verified that the appropnate VLANs are configured and applied on the two access switches. You are using RSTP as your loop prevention mechanism. Unfortunately, the users are not able to communicate with their corresponding server attached to the Access-2 switch.
In this scenario, what should you do to solve this problem?
- A. Configure the access interfaces on the Access-2 switch under MVRP.
- B. Configure the access interfaces on the Access-1 switch under MVRP.
- C. Configure VSTP instead of RSTP as your loop-prevention mechanism.
- D. Configure the ge-070716.0 interface on the Core-1 switch under MVRP.
Answer: D
Explanation:
The exhibit shows a network topology where Multiple VLAN Registration Protocol (MVRP) is used to dynamically manage VLANs across switches Core-1, Access-1, and Access-2.
* Identifying the Missing Configuration: According to the diagram, the trunk link between Core-1 and Access-2 uses interface ge-0/0/16.0 on the Core-1 side.
* Output Analysis: However, the show protocols mvrp output for Core-1 only lists interfaces ge-0/0/14.
0 and ge-0/0/15.0.
* MVRP Requirements: For MVRP to successfully propagate VLAN information between Access-2 and the rest of the network, the protocol must be enabled on every trunk interface in the path.
* Solution: Because ge-0/0/16.0 is missing from the Core-1 MVRP configuration, VLAN registration messages from Access-2 are not being processed by Core-1. Configuring this interface under MVRP on Core-1 will solve the communication problem.
NEW QUESTION # 17
Which two statements are true regarding MAC limiting on a Juniper switch? (Choose two.)
- A. Ports disabled by MAC limiting are re-enabled after the default timeout.
- B. Ports disabled by MAC limiting are reset if a new device is connected to the port.
- C. Ports disabled by MAC limiting are disabled until the administrator clears the blocking state.
- D. Ports disabled by MAC limiting can be configured to automatically re-enable after a period of time.
Answer: C,D
NEW QUESTION # 18
When is it most appropriate to use BGP instead of an IGP like OSPF?
- A. Within an autonomous system with a single link between routers.
- B. In small networks with limited numbers of routes.
- C. For inter-domain routing between autonomous systems.
- D. When a network requires fast convergence times.
Answer: C
NEW QUESTION # 19
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 Anycast RP.
- C. Configure MSDP.
- D. Configure Auto-RP
Answer: A
Explanation:
The exhibit shows a multicast network runningPIM Sparse Modewhere 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 usingstandard protocolsfor 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 aproprietaryCisco 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 betweendifferentPIM 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 # 20
Exhibit.
Referring to the exhibit, which statement is correct?
- A. The device with the highest IP address is elected as the DR.
- B. The device with the lowest IP address is elected as the DR.
- C. The OSPF state will be stuck in the 2Nay state
- D. The OSPF state will be stuck in the Exstart state
Answer: C
Explanation:
In OSPF, the election of aDesignated Router (DR)and aBackup Designated Router (BDR)is mandatory on broadcast and non-broadcast multi-access (NBMA) network types to manage link-state database synchronization efficiently.
The exhibit shows that bothdevice1anddevice2have their OSPF interface priority explicitly set to0. According to the Junos OS 24.4 OSPF implementation:
* Ineligibility (Priority 0):A router with a priority of 0 is strictlyineligibleto be elected as a DR or BDR for that segment.
* No Election Possible:When every router on a broadcast segment has a priority of 0, the election process cannot complete because there are no eligible candidates to fill the required roles.
* State Behavior (Stuck in 2-Way):In OSPF adjacency formation, the2-Way stateindicates that bidirectional communication has been established (each router has seen itself in the other's Hello packets). However, to progress to theExstartandExchangestates on a multi-access network, routers must first identify a DR and BDR.
* Result:Since neither router can become the DR, they both wait indefinitely for a third party (with priority > 0) to take the lead. Consequently, the OSPF adjacency will bestuck in the 2-Way state.
Adjacencies only reach theFullstate with the DR and BDR; routers in a "DROther" role remain in 2- Way with each other.
Option A and Dare incorrect because the router ID (IP address) only acts as a tiebreaker if priorities are equal andgreater than 0.Option Bis incorrect because routers cannot reach the Exstart state (where they negotiate master/slave for database exchange) without first having a DR/BDR elected.
NEW QUESTION # 21
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.)
- A. The configuration imports all default classification assignments that are not specified.
- B. This custom DSCP classifier must be associated with logical interfaces.
- C. This custom DSCP classifier must be associated with physical interfaces.
- D. The default classification assignment overwrites all specified classifications
Answer: A,B
NEW QUESTION # 22
Which statement is true regarding LLDP advertisements?
- A. LLDP communicates device information to neighbors
- B. LLDP communicates VLAN information to VoIP devices
- C. LLDP communicates power requirements from PoE enabled devices
- D. LLDP communicates CoS values to VoIP devices
Answer: A
NEW QUESTION # 23
Which two EVPN types advertise an ESI without advertising a MAC address? (Choose two.)
- A. Type 3
- B. Type 4
- C. Type1
- D. Type 2
Answer: B,C
Explanation:
In an EVPN-VXLAN environment, different BGP route types serve distinct purposes in building the control plane. TheEthernet Segment Identifier (ESI)is a unique 10-byte identifier used to represent a multi-homed segment.
* Type 1: Ethernet Auto-Discovery (A-D) Route (Option A):This route type is essential for multi- homing scenarios. It carries theESIto support features likefast convergenceandaliasing. By advertising an A-D route per Ethernet Segment, a PE tells other routers that it is connected to that specific ESI. It doesnotcarry individual host MAC addresses; instead, it provides a "mass withdraw" mechanism to quickly update paths if the entire segment goes down.
* Type 4: Ethernet Segment Route (Option D):This route is used exclusively forDesignated Forwarder (DF) election. It advertises the existence of anESIand the ES-Import Route Target to all other PE routers. This allows PE routers connected to the same multi-homed segment to discover each other automatically and elect a DF to handle BUM traffic. Like Type 1, it focuses on the segment identity and doesnotinclude MAC addresses.
* Type 2: MAC/IP Advertisement Route (Option B):This is the primary route used for host reachability. Itmustinclude a MAC address (and optionally an IP). While it also includes the ESI to indicate which segment the host is behind, its primary function is MAC advertisement.
* Type 3: Inclusive Multicast Ethernet Tag Route (Option C):This route is used for VTEP discovery and building the replication list for BUM traffic. It identifies the VTEP's IP and the VNI, but it doesnot carry the ESI or MAC addresses.
NEW QUESTION # 24
Which two statements are true about 802.1Z dynamic filters based on RADUIS attributes? (Choose two.)
- A. Filters can be defined on the network management system and deployed using vendor-specific attributes.
- B. Filters can be defined on the authentication server and deployed using vendor-specific attributes.
- C. Filters can be defined on an automation framework and deployed when triggered by an authentication syslog message.
- D. Filters can be defined on the switch and deployed upon authentication.
Answer: B,D
NEW QUESTION # 25
Which of the following is an application of MSDP in a multicast network?
- A. To reduce the size of the multicast routing table.
- B. To encrypt multicast traffic between the sender and receivers.
- C. To allow the advertisement of multicast sources between AS boundaries.
- D. To manage PIM-SM state information more effectively.
Answer: C
NEW QUESTION # 26
Which two statements are correct about multicast routing tables? (Choose two.)
- A. inet. 2 is used when the multicast forwarding topology differs from unicast forwarding
- B. MBGP and IS-IS place routes in met. l directly.
- C. inet. 0 is used for RPF checks.
- D. IS-IS and OSPFv3 place routes in met. 2 directly.
Answer: A,C
Explanation:
Junos OS uses specific routing tables for handling multicast traffic to ensure loop prevention through Reverse Path Forwarding (RPF) checks:
* Multicast RPF (Option C):Theinet.0table is the default unicast routing table. In most standard multicast deployments, Protocol Independent Multicast (PIM) performs itsRPF checksagainst this table to determine the upstream interface toward the multicast source.
* Topology Differences (Option A):Theinet.2table is specifically designed for multicast RPF lookups when themulticast forwarding topology differsfrom the unicast forwarding topology. This is common in environments using Multiprotocol BGP (MBGP) where you might want multicast traffic to follow a different path than standard data traffic.
* inet.1 Role (Option B):Theinet.1table is themulticast forwarding cache. It stores (S,G) and (*,G) entries for actual packet forwarding. Routing protocols like MBGP or IS-IS do not place routesdirectly into inet.1; instead, PIM uses information from inet.0 or inet.2 to populate inet.1.
* IS-IS and OSPFv3 (Option D):These protocols place their IPv4/IPv6 unicast routes into inet.0 or inet6.
0. They do not place routes into inet.2 "directly" unless specific RIB-group configurations or address families are enabled to share those routes for multicast RPF purposes.
NEW QUESTION # 27
Which two statements are true regarding PIM sparse mode? (Choose two.)
- A. There can be multiple RPs in a network.
- B. Auto-RP and bootstrap election can be configured simultaneously.
- C. The RP selection can be done by auto-RP or bootstrap, but not both.
- D. There can only be one RP in a network.
Answer: A,B
NEW QUESTION # 28
Referring to the outputs shown in the exhibit, which two statements are correct about the IS-IS adjacency? (Choose two.)
- A. R1 is configured to participate in both Level 1 and Level 2.
- B. R2 is configured to participate in both Level 1 and Level 2.
- C. R1 is configured to participate in Level 2 only.
- D. R2 is configured to participate in Level 2 only.
Answer: B,C
NEW QUESTION # 29
Click the Exhibit button.
Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?
- A. The switch5 device will send a Type 4 route to all peers.
- B. The switch5 device will send a Type 3 route to all peers.
- C. The switch5 device will send a Type 2 route to all peers.
- D. The switch5 device will send a Type 1 route to all peers.
Answer: D
NEW QUESTION # 30
Which two statements are true regarding IGMP snooping? (Choose two.)
- A. It reduces multicast traffic replication.
- B. It provides network security for multicast traffic.
- C. It is used for logging multicast traffic flows.
- D. It allows a Layer 2 switch to view IGMP traffic between receivers and a router.
Answer: A,D
NEW QUESTION # 31
What does the 'local-preference' BGP attribute indicate?
- A. The preference of a route based on the originating AS.
- B. The preference of route selection within the local autonomous system.
- C. The preference given to routes received from an eBGP peer.
- D. The preferred path for incoming traffic from other autonomous systems.
Answer: B
NEW QUESTION # 32
When configuring an Anycast RP, which of the following is true?
- A. Only one physical RP exists for each multicast group.
- B. Anycast RP is incompatible with MSDP.
- C. Multiple RPs with the same IP address serve multicast groups.
- D. Anycast RP does not support PIM-SM.
Answer: C
NEW QUESTION # 33
Which two statements are true regarding the single rate tricolor token bucket algorithm? (Choose two.)
- A. Token buckets are filled at different rates.
- B. It creates two token buckets.
- C. It creates three token buckets.
- D. Token buckets are filled at the same rate.
Answer: B,D
NEW QUESTION # 34
You have a P-VLAN that spans multiple switches.
In this scenario, how do you enable communication across the P-VLAN?
- A. Configure trunk ports with isolated-vian <vlan-id> on the switches.
- B. Configure trunk ports with inter-switch-link on the switches
- C. Configure trunk ports with private-vlan isolated on the switches.
- D. Configure trunk ports with private-vlan community on the switches.
Answer: A
Explanation:
Private VLANs (PVLANs) provide Layer 2 isolation between ports within the same broadcast domain. When a PVLAN spans multiple switches, a special type of trunk configuration is required to maintain the isolation and community logic across the inter-switch links.
* Isolated VLAN Trunking (Option D):To extend an isolated VLAN across multiple switches, you must configure the trunk port on each switch to allow the isolated VLAN ID. In Junos OS, this is specifically achieved by configuring the interface as a trunk and associating it with the primary VLAN and the specific isolated VLAN. The correct syntax for enabling this inter-switch communication is to configure trunk ports that recognize the isolated VLAN tag (e.g., set interfaces <interface> unit 0 family ethernet-switching vlan members [ primary-vlan isolated-vlan ]).
* Forwarding Rules:Traffic from an isolated port on Switch A must reach a promiscuous port (often on Switch B) to exit the PVLAN. The inter-switch trunk carries this traffic using the secondary (isolated) VLAN ID, ensuring that it remains isolated from other host ports on the remote switch.
* Option A (inter-switch-link):In standard Junos switching, the inter-switch-link statement is used in Virtual Chassis or specific fabric designs, but for standard PVLAN extension, standard 802.1Q trunking with secondary VLAN IDs is the mechanism used.
* Options B and C:These describe specific portroles(isolated vs. community) rather than the method used to enable trunking between switches.
NEW QUESTION # 35
You are asked to configure an 802.1X solution that supports dynamic VLAN assignment.
In this scenario, which two modes support using vendor-specific attributes (VSAs)? (Choose two.)
- A. single-secure supplicant mode
- B. static MAC bypass mode
- C. multiple supplicant mode
- D. single supplicant mode
Answer: C,D
NEW QUESTION # 36
You are deploying a three-stage EVPN environment with VXLAN using EX and QFX Series switches. The leaf devices will perform the gateway services. Which two statements are correct in this scenario? (Choose two.)
- A. Only the leaf devices must support VXLAN capabilities.
- B. The spine devices will function as VTEPs.
- C. Both the leaf and spine devices must support VXLAN capabilities.
- D. The leaf devices will function as VTEPs
Answer: C,D
Explanation:
In a three-stage EVPN-VXLAN fabric (Spine-Leaf architecture) where leaf devices perform the gateway services (Edge-Routed Bridging or ERB):
* VTEP Functionality (Option B): Leaf devices act as VXLAN Tunnel End Points (VTEPs). They are responsible for encapsulating Ethernet frames from locally connected hosts into VXLAN packets for transport across the IP fabric and de-encapsulating incoming VXLAN packets.
* Fabric Support (Option C): In a standard Juniper IP fabric design, both the leaf and spine devices are typically expected to support VXLAN and EVPN capabilities. While spines in an ERB design might only perform IP forwarding in the underlay, they often participate in the BGP control plane (as Route Reflectors) or provide the ability to transition to Centrally-Routed Bridging (CRB) where spines would act as gateways.
* Incorrect Options: Option A is incorrect because the entire fabric infrastructure must be "VXLAN aware" in terms of MTU settings and routing capability to support the overlay. Option D is incorrect because in an ERB design, the spine devices are high-speed transit nodes and do not terminate VXLAN tunnels; only the edge (leaf) devices act as VTEPs.
NEW QUESTION # 37
You have created a private community VLAN called RND The private community VLAN works fine within switch S1, but traffic in the private RND community VLAN does not reach VLAN members connected to switch S2.
Which statement is correct in this scenario?
- A. The RND Community VLAN needs to be stripped of all 802.1Q tags.
- B. The RND community VLAN needs to have an associated 802.1Q tag associated with it.
- C. The RND Community VLAN needs to have the same 802.1Q tag as its parent VLAN
- D. The RND community VLAN needs to be defined as an isolated VLAN.
Answer: B
NEW QUESTION # 38
Which statement about LLDP and LLDP-MED operations on EX Series devices is correct?
- A. EX Series devices flood LLDP frames across a Layer 2 domain to calculate a network topology
- B. LLDP-MED focuses on discovering network connectivity devices like routers and switches.
- C. EX Series devices support LLDP-MED power negotiation, enabling dynamic allocation of PoE power based on endpoint device needs.
- D. LLDP only operates on interfaces configured for Layer 2
Answer: C
NEW QUESTION # 39
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