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100% Pass 2025 Juniper JN0-280: Data Center, Associate (JNCIA-DC)–Valid Exam Sample

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Juniper JN0-280 (Data Center, Associate (JNCIA-DC)) Certification Exam is one of the most well-regarded certifications in the IT industry, focused on data center architecture and design. Data Center, Associate (JNCIA-DC) certification is designed for individuals who want to establish their expertise in data center technologies and improve their career prospects in this field. JN0-280 Exam covers a wide range of topics, including basic switching and routing concepts, data center architecture, and network automation.

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Latest JN0-280 Test Dumps & Exam JN0-280 Format

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q43-Q48):

NEW QUESTION # 43
What is the primary function of a VLAN?

A. To encrypt network traffic.
B. To control network traffic based on MAC addresses.
C. To provide a routing mechanism between different networks.
D. To segment a network into multiple broadcast domains.

Answer: D

NEW QUESTION # 44
Which three technologies improve high availability and convergence in a data center network? (Choose three.)

A. graceful restart (GR)
B. Bidirectional Forwarding Detection (BFD)
C. link loss adjacency
D. Failover Group (FG)
E. link aggregation group (LAG)

Answer: A,B,E

Explanation:
High availability and fast convergence are critical in data center networks to minimize downtime and maintain optimal performance. The following technologies contribute to achieving these goals:
* Graceful Restart (GR):
* GR allows routers to maintain forwarding state during control plane restarts, ensuring continuous packet forwarding while minimizing network disruptions.
* Bidirectional Forwarding Detection (BFD):
* BFD provides fast detection of path failures, allowing routing protocols to converge quickly by detecting link failures much faster than traditional timers.
* Link Aggregation Group (LAG):
* LAG increases both redundancy and bandwidth by combining multiple physical links into one logical link, providing load balancing and fault tolerance.
Juniper Reference:
* High Availability Techniques: These technologies are fundamental in ensuring rapid recovery and failover within Juniper-based data center environments.

NEW QUESTION # 45
You are troubleshooting a downed BGP session.

Referring to the exhibit, what is the cause of the problem?

A. The TCP session between the peers has not been established.
B. The local peer has sent an Update message but not received one from the remote peer.
C. The local peer has sent an Open message but not received one from the remote peer.
D. The UDP session between the peers has not been established.

Answer: A

Explanation:
The BGP session in the exhibit shows the state asConnect, which indicates that theTCP sessionbetween the BGP peers has not been fully established.
Step-by-Step Breakdown:
* BGP State "Connect":
* TheConnectstate is the second stage in the BGP finite state machine (FSM). At this stage, BGP is trying to establish aTCP sessionwith the peer, but the session has not yet been successfully established.
* A successful TCP three-way handshake (SYN, SYN-ACK, ACK) is required before BGP can progress to theOpenSentstate, where the peers exchange BGP Open messages.
* Possible Causes:
* A firewall blocking TCP port179.
* Incorrect IP addresses or network connectivity issues between the BGP peers.
Juniper Reference:
* BGP Troubleshooting: In Junos, if a BGP session is stuck in theConnectstate, the issue is likely due to a failure in establishing the underlying TCP connection.

NEW QUESTION # 46
BGP is primarily used for which purpose in a network?

A. Internal routing within a single autonomous system
B. Connecting different autonomous systems and route sharing
C. Providing Layer 2 connectivity
D. Encrypting data traffic between networks

Answer: B

NEW QUESTION # 47
What is the default Junos behavior of access ports?

A. Allow only tagged traffic
B. Allow both tagged and untagged traffic
C. Allow only untagged traffic
D. Allow a maximum of 80 percent untagged traffic

Answer: C

NEW QUESTION # 48
......

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