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| Section | Objectives |
|---|---|
| MPLS and Service Provider Technologies | - VPN services
|
| BGP and Routing Policy | - Routing policy control
|
| Service Provider Architecture & Junos Fundamentals | - Junos OS routing fundamentals
|
| Troubleshooting and Operations | - Network troubleshooting methodology
|
| OSPF and IS-IS Routing Protocols | - IS-IS operation in service provider networks
|
>> JN0-364 Certification Sample Questions <<
The Juniper JN0-364 practice material of VCEEngine came into existence after consultation with many professionals and getting their positive reviews. The majority of aspirants are office professionals, and we recognize that you don't have enough time to prepare for the Juniper JN0-364 Certification Exam. As a result, several versions of the Service Provider Routing and Switching, Specialist (JNCIS-SP) (JN0-364) exam questions will be beneficial to you.
NEW QUESTION # 12 
In the exhibit, Site A is sending traffic to Site B. R1 adds MPLS label 7166 to direct the traffic to R5. Which two criteria did R1 use to determine which label number to add to the traffic? (Choose two.)
Answer: B,C
Explanation:
In a Juniper Networks MPLS environment, the process by which a router determines how to forward traffic involves both the control plane and the data plane. When R1 (acting as an Ingress Label Edge Router, or LER) receives an IP packet from Site A destined for Site B, it must perform a lookup to decide whether to forward the packet via standard IP routing or via an MPLS Label Switched Path (LSP).
The first criterion R1 uses is thedestination address of the traffic(Option C). Upon receiving the native IP packet, R1 looks up the destination IP in its routing table (typically inet.0). If the destination matches a prefix that is associated with an LSP-such as the loopback address of R5 or a prefix reachable via R5-the router identifies the appropriate Forwarding Equivalence Class (FEC). The FEC essentially groups packets that should be forwarded in the same manner over the same path. Without identifying the destination, the router cannot map the traffic to the correct MPLS tunnel.
The second criterion is thelabel number advertisement received from R2(Option D). MPLS relies on downstream label allocation. In this topology, R2 is the immediate downstream "next hop" for R1 on the path to Site B. For the LSP to be established, R2 must signal a label to R1 using a protocol like LDP (Label Distribution Protocol) or RSVP (Resource Reservation Protocol). This label (in this case, 7166) tells R1: "If you want to send traffic to the destination associated with this LSP, wrap it in this specific label so I know how to process it." R1 does not use the source address (Option A) for standard label mapping, nor does it receive the label directly from R5 (Option B) in a hop-by-hop signaling model; it must use the label provided by its direct neighbor, R2. Therefore, by combining the destination IP (to find the path) and the label provided by the next hop (to encapsulate the packet), R1 successfully directs the traffic through the MPLS core.
NEW QUESTION # 13
A service provider is onboarding a new enterprise customer that operates multiple branch offices, each with its own set of VLANs. The customer requires transparent Layer 2 connectivity between sites while maintaining separation of internal VLANs. The provider must also ensure that customer VLAN identifiers do not conflict with other customers on the shared infrastructure.
Which solution would provide the desired results?
Answer: D
Explanation:
Q-in-Q tunneling (802.1ad) allows a service provider to encapsulate customer VLAN tags inside an additional provider VLAN tag. This enables transparent Layer 2 connectivity between customer sites while preserving the customer's internal VLAN structure. The outer service- provider VLAN tag ensures separation between different customers and prevents VLAN ID conflicts on the shared provider infrastructure.
NEW QUESTION # 14
Which BGP message type is used to re-advertise routes that have already been sent to a peer and acknowledged using TCP?
Answer: B
Explanation:
In BGP (Border Gateway Protocol), the Update message is used to advertise new routes to a peer or to withdraw previously advertised routes. If there's a change in the routing information or if a new route needs to be advertised, BGP uses an Update message. This message is crucial for maintaining the most current and accurate routing information among BGP peers.
The other message types serve different purposes:
Keepalive: This message type is used to maintain the connection between BGP peers and ensure that the link is still active. Keepalive messages are periodically sent between peers when there is no other BGP activity to maintain the session.
Notification: This message is used to indicate errors or other significant events to a BGP peer. If a BGP error condition is detected, a Notification message is sent and the BGP session is typically closed.
Refresh: This is not a standard BGP message type. However, in the context of BGP, Route Refresh is a capability (not a message type) that allows a BGP router to request a full or partial re-advertisement of routes from a peer. This helps in re-synchronizing routing tables without tearing down the BGP session.
The BGP Update message is used to advertise routable destinations and includes route advertisements, route withdrawals, and path attribute modifications. Update messages are used to re-advertise routes that have already been acknowledged.
NEW QUESTION # 15
Referring to the exhibit, which two statements are correct? (Choose two.)
Answer: B,D
Explanation:
In the given exhibit, interface ge-0/0/0 is configured to accept VLANs 101-120 and ge-0/0/1 is configured with flexible VLAN tagging, which means it can tag traffic with any VLAN ID specified.
However, only VLAN 200 is explicitly mentioned for ge-0/0/1. A. Traffic tagged with VLAN 101 will pass through ge-0/0/0 and will egress on ge-0/0/1 with the same VLAN tag, because the VLAN ID is within the allowed range on both interfaces. B. VLAN 100 is not specified in the allowed VLAN range for ge-0/0/0 (which is 101-120), nor is it specified under ge-0/0/1. Therefore, it will be dropped.
NEW QUESTION # 16
Exhibit:
Referring to the exhibit, you have configured R1, R2, R3, and R4 to be a part of OSPF area 0 and you have connected them to a broadcast segment. Assuming all four routers come online within one minute of each other, which router becomes the DR and which router becomes the BDR?
Answer: C
Explanation:
In OSPF networks, when multiple routers are connected to a shared multi-access broadcast segment (like an Ethernet switch), they undergo an election process to select aDesignated Router (DR)and aBackup Designated Router (BDR). This mechanism is essential for reducing the number of adjacencies and limiting the volume of Link State Advertisement (LSA) flooding on the segment.
The OSPF election process follows a strict hierarchy based on the following criteria:
* Interface Priority:The router with the highest OSPF interface priority is elected as the DR. The router with the second-highest priority becomes the BDR. In Junos, the default priority is 128, but it can be manually configured between 0 and 255.
* Router ID:If there is a tie in priority, the router with the numerically highest Router ID (RID) wins the election.
Analyzing the configuration provided in the exhibit:
* R1:Priority 200, Router-ID 192.168.1.1
* R2:Priority 100, Router-ID 192.168.1.2
* R3:Priority 50, Router-ID 192.168.1.3
* R4:Priority 90, Router-ID 192.168.1.4
Comparing the priority values,R1 has the highest priority (200)and therefore becomes theDR. The next highest priority value among the remaining routers is100, which belongs to R2, making it theBDR. Although R4 has a higher Router ID than R2, the priority value is evaluated first and takes precedence.
Since all routers came online within a short window (one minute), they participate in the same election cycle, ensuring the configured priorities dictate the outcome rather than "first-come, first-served" preemption behavior common in OSPF once a DR is already established.
NEW QUESTION # 17
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