JN0-664 VALID EXAM MATERIALS | HIGH-QUALITY JN0-664: SERVICE PROVIDER, PROFESSIONAL (JNCIP-SP)

JN0-664 Valid Exam Materials | High-quality JN0-664: Service Provider, Professional (JNCIP-SP)

JN0-664 Valid Exam Materials | High-quality JN0-664: Service Provider, Professional (JNCIP-SP)

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The JN0-664 Exam is a comprehensive exam that covers a wide range of topics that are essential for service provider professionals. These topics include advanced routing technologies, IP multicast, Layer 2 switching, and Layer 3 VPNs. JN0-664 exam is designed to test the knowledge and skills of professionals who work with Juniper Networks technologies in a variety of service provider environments, including data centers, service provider networks, and enterprise networks.

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Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q62-Q67):

NEW QUESTION # 62
Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501.
Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?

  • A. peer IP address
  • B. IGP metric
  • C. router ID
  • D. MED value

Answer: C

Explanation:
By default, the MED attribute is only compared for routes received from the same neighbouring AS.
The next feasible tiebreaker in the BGP route selection algorithm would be Router ID.


NEW QUESTION # 63
Exhibit

You have MAC addresses moving in your EVPN environment
Referring to the exhibit, which two statements are correct about the sequence number? (Choose two)

  • A. It identifies MAC addresses that should be discarded.
  • B. It is advertised using a Type 2 message
  • C. It helps the local PE to identify the latest advertisement.
  • D. It resolves conflicting MAC address ownership claims.

Answer: B,C

Explanation:
In an EVPN (Ethernet Virtual Private Network) environment, MAC address mobility is a critical feature that allows devices to move across different locations while ensuring the network consistently tracks their MAC addresses. Let's break down the components in the exhibit and analyze the correct statements.
Understanding MAC Mobility and Sequence Numbers in EVPN
In EVPN, MAC mobility is managed through sequence numbers that are included in Type 2 MAC/IP advertisements.
The sequence number tracks MAC movement events and is used to determine the most recent update when a MAC address appears on different PEs (Provider Edge devices).
When a MAC address moves between locations, the EVPN PEs increment the sequence number and advertise it to resolve conflicts and determine which PE has the most up-to-date information.
Now, Let's Review the Options:
✅ C. It helps the local PE to identify the latest advertisement.
Correct:
The sequence number plays a key role in resolving MAC address conflicts. If multiple PEs advertise the same MAC address, the PE compares the sequence numbers to determine which update is the latest.
A higher sequence number indicates a more recent MAC update.
✅ D. It is advertised using a Type 2 message.
Correct:
EVPN MAC/IP advertisements use BGP EVPN Type 2 messages to carry MAC addresses, IP addresses (optional), and their associated sequence numbers.
Type 2 advertisements are used to track MAC mobility and IP reachability information in the EVPN.
Why the Other Options Are Incorrect:
❌ A. It identifies MAC addresses that should be discarded.
Incorrect:
The sequence number doesn't identify MAC addresses that need to be discarded.
Instead, it resolves conflicts by determining the most recent MAC address advertisement based on the highest sequence number.
❌ B. It resolves conflicting MAC address ownership claims.
Partially true, but misleading:
While it's true that sequence numbers are used in conflict resolution, the sequence number itself doesn't directly resolve ownership claims. It only helps determine which advertisement is more recent. The actual conflict resolution happens through the comparison of the advertisements and sequence numbers.
Final answer:
✅ C. It helps the local PE to identify the latest advertisement.
✅ D. It is advertised using a Type 2 message.
Reference from Juniper Documentation:
Juniper EVPN Configuration Guide:
"In EVPN MAC/IP advertisements, sequence numbers track the mobility of MAC addresses and are used to resolve conflicts when the same MAC address is advertised by multiple PEs. The PE with the higher sequence number has the most recent information." Juniper BGP EVPN Mobility Documentation


NEW QUESTION # 64
Exhibit

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

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

Answer: B,D

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 # 65
You want to ensure that a single-area OSPF network will be loop free.
In this scenario, what are two requirements that satisfy this requirement? (Choose two.)

  • A. Nodes within an area must connect in a full mesh.
  • B. The Shortest Path First algorithm must prune looped paths.
  • C. The DR/BDR ensures that each node within an area has the same information in their LSDBs.
  • D. All nodes within an area must have the same information in their LSDBs.

Answer: B,D

Explanation:
DR/BDR doesn't ensure information sharing within the domain.


NEW QUESTION # 66
Exhibit.

Referring to the exhibit, which path would traffic passing through R1 take to get to R4?

  • A. R1 -> R4
  • B. R1 -> R2 -> R3 -> R4
  • C. R1 -> R3 -> R4
  • D. R1 -> R2 -> R4

Answer: D

Explanation:
The OSPF cost is carried in the LSAs that are exchanged within an OSPF area. When a router calculates the cost to a destination it uses the cost of the exit interface of each router in the path to the destination.


NEW QUESTION # 67
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