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To achieve the Juniper JN0-664 certification, candidates must demonstrate a thorough understanding of these topics and be able to apply their knowledge to real-world scenarios. Service Provider, Professional (JNCIP-SP) certification is ideal for network engineers who want to advance their careers in service provider networking and demonstrate their proficiency in Juniper Networks technologies. Service Provider, Professional (JNCIP-SP) certification is also valuable for organizations that employ Juniper Networks technologies and want to ensure that their network engineers have the necessary skills and knowledge to manage and operate their networks effectively.

The JN0-664 Exam covers a wide range of topics, including OSPF, IS-IS, BGP, MPLS, Layer 3 VPNs, Layer 2 VPNs, Class of Service, and IP multicast. JN0-664 exam consists of 65 multiple-choice questions that need to be completed within 120 minutes. JN0-664 exam is computer-based, and the passing score is 65%. Candidates who pass the JN0-664 exam will be awarded the Juniper Networks Certified Professional Service Provider (JNCIP-SP) certification.

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The JN0-664 Exam is one of the most comprehensive exams offered by Juniper Networks. JN0-664 exam covers a wide range of topics, including protocol-independent routing, BGP, OSPF, ISIS, MPLS, Layer 2 VPNs, Layer 3 VPNs, multicast, and QoS. Candidates must have a deep understanding of these topics to pass the exam.

Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q79-Q84):

NEW QUESTION # 79
Exhibit

Which two statements about the output shown in the exhibit are correct? (Choose two.)

A. The PE is attached to a single local site.
B. The PE router has the capability to pop flow labels
C. The connection has not flapped since it was initiated.
D. There has been a VLAN ID mismatch.

Answer: A,C

Explanation:
The output is from the show l2vpn connections command on a Juniper router. This command is used to verify the status of Layer 2 VPN (L2VPN) pseudowires between Provider Edge (PE) routers.
Breakdown of Key Information:
* Instance: vpn-A
* This is the L2VPN instance being monitored.
* Connection Status (St)
* The connection status is "Up", meaning the pseudowire is operational.
* Local Site: CE1-2 (2)
* The PE router is attached to a single local site (CE1-2).
* Uptime & Connection Flaps
* The output shows the last time the connection was up:
Time last up: Apr 11 14:35:27 2020
* The "# Up trans" value is 1, meaning this connection has been established once and has not flapped since it was initiated.
* VLAN ID Mismatch Check
* The legend includes "VM - VLAN ID mismatch", but this status is not present in the connection output.
* This means there is NO VLAN ID mismatch.
* Flow Labels
* The Flow Label Transmit is No, and the Flow Label Receive is No.
* This means the PE router does NOT have the capability to pop flow labels.

NEW QUESTION # 80
You are configuring schedulers to define the class-of-service properties of output queues. You want to control packet drops during periods of congestion.
In this scenario, which CoS configuration parameter would be used to accomplish this task?

A. drop profile
B. priority
C. buffer size
D. shaping rate

Answer: A

NEW QUESTION # 81
Exhibit

Which two statements about the configuration shown in the exhibit are correct? (Choose two.)

A. A Layer 2 VPN is configured.
B. This VPN connects customer sites that use different AS numbers.
C. A Layer 3 VPN is configured.
D. This VPN connects customer sites that use the same AS number

Answer: B,C

Explanation:
Explanation
The configuration shown in the exhibit is for a Layer 3 VPN that connects customer sites that use different AS numbers. A Layer 3 VPN is a type of VPN that uses MPLS labels to forward packets across a provider network and BGP to exchange routing information between PE routers and CE routers. A Layer 3 VPN allows customers to use different routing protocols and AS numbers at their sites, as long as they can peer with BGP at the PE-CE interface. In this example, CE-1 is using AS 65530 and CE-2 is using AS 65531, but they can still communicate through the VPN because they have BGP sessions with PE-1 and PE-2, respectively.

NEW QUESTION # 82
You are a network architect for a service provider and want to offer Layer 2 services to your customers. You want to use EVPN for Layer 2 services in your existing MPLS network.
Which two statements are correct in this scenario? (Choose two.)

A. VXLAN must be configured on all PE routers.
B. Segment routing must be configured on all PE routers.
C. EVPN uses Type 3 routes to join a multicast tree to flood traffic.
D. EVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping.

Answer: C,D

NEW QUESTION # 83
Exhibit

CE-1 must advertise ten subnets to PE-1 using BGP Once CE-1 starts advertising the subnets to PE-1, the BGP peering state changes to Active.
Referring to the CLI output shown in the exhibit, which statement is correct?

A. CE-1 is advertising its entire routing table.
B. CE-1 is configured with an incorrect peer AS
C. The prefix limit has been reached on PE-1
D. CE-1 is unreachable

Answer: C

Explanation:
Analyzing the Exhibit and Understanding the Issue
The exhibit shows BGP configurations on CE-1 and PE-1, which are connected via EBGP.
CE-1 (Customer Edge)
Uses AS 64511 and establishes an EBGP session with PE-1 (AS 65550).
Configured to export 10 static routes (192.168.1.0/24 - 192.168.10.0/24) using the static-to-bgp policy.
PE-1 (Provider Edge)
Uses AS 65550 and is peering with CE-1 (AS 64511).
Configured with a prefix-limit of 5 on received routes from CE-1.
Teardown enabled, meaning if more than 5 prefixes are received, the BGP session is shut down.
Identifying the Problem
CE-1 is correctly configured with peer AS 65550, so Option B ("CE-1 is configured with an incorrect peer AS") is incorrect ❌.
CE-1 is advertising exactly 10 static routes (as per policy).
PE-1 has a prefix-limit maximum 5 with teardown enabled.
This means that when CE-1 advertises more than 5 prefixes, PE-1 shuts down the BGP session.
BGP moves to the "Active" state, indicating that the session has been disrupted and PE-1 is trying to re-establish the connection.
CE-1 is reachable since the session was initially established before the limit was exceeded, so Option D ("CE-1 is unreachable") is incorrect ❌.
CE-1 is not advertising its entire routing table, only the static prefixes listed in the policy, so Option A ("CE-1 is advertising its entire routing table") is incorrect ❌.
Correct Answer
✅ C. The prefix limit has been reached on PE-1
Verification from Juniper Documentation
Juniper BGP Prefix Limit Documentation confirms that exceeding the prefix limit with teardown causes the BGP session to go into "Active" state.
Juniper Troubleshooting Guide for BGP Peering Issues states that when a BGP session reaches the prefix limit and has teardown enabled, the session is terminated.

NEW QUESTION # 84
......

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