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Juniper JN0-280 certification exam is designed to test the knowledge and skills of individuals in the field of data center networking. Data Center, Associate (JNCIA-DC) certification is targeted towards individuals who want to gain a thorough understanding of data center networking technologies, including virtualization, storage, and network security. Data Center, Associate (JNCIA-DC) certification exam is aimed at those who are looking to start their career in the field of data center networking or those who want to enhance their existing skills and knowledge.
The JN0-280 exam covers a range of topics related to data center networking, including data center architecture, Ethernet switching, VLANs, Spanning Tree Protocol, and link aggregation. It also covers Juniper Networks devices and technologies, including Junos OS, virtual chassis technology, and Juniper Networks QFabric system.
NEW QUESTION # 11
Which of the following are true about Layer 2 and Layer 3 strategies in data center architectures? (Choose two)
- A. Layer 3 strategies help in reducing broadcast domains.
- B. Layer 2 strategies are typically used for creating large, flat networks.
- C. Layer 2 strategies are primarily used for inter-data center connectivity.
- D. Layer 3 strategies cannot be used in conjunction with Layer 2 environments.
Answer: A,B
NEW QUESTION # 12
Which OSPF troubleshooting tool is used to check the OSPF process and neighborship?
- A. SNMP
- B. Ping
- C. Route summarization
- D. Traceoptions
Answer: D
NEW QUESTION # 13
What is a VLAN?
- A. A broadcast domain, identified by a VLAN ID
- B. A local network using only virtual machines
- C. A multicast domain, identified by a VLAN ID
- D. A broadcast domain, using only virtual machines
Answer: A
NEW QUESTION # 14
Filter-based forwarding is typically used to:
- A. Increase the security of the routing process.
- B. Automatically generate routing entries.
- C. Implement policy-based routing decisions.
- D. Optimize the routing table size.
Answer: C
NEW QUESTION # 15
BGP is primarily used for which purpose in a network?
- A. Internal routing within a single autonomous system
- B. Providing Layer 2 connectivity
- C. Connecting different autonomous systems and route sharing
- D. Encrypting data traffic between networks
Answer: C
NEW QUESTION # 16
Load balancing in routing is used to:
- A. Compress data to improve transmission speed.
- B. Distribute traffic evenly across multiple paths.
- C. Automatically update routing tables.
- D. Encrypt data packets.
Answer: B
NEW QUESTION # 17
In the context of Link Aggregation Groups (LAG), what is the primary purpose of LACP?
- A. To provide a method for encrypting data packets
- B. To dynamically manage the bundling of several physical ports
- C. To reduce the speed of data transfer
- D. To increase the error rate in data transmission
Answer: B
NEW QUESTION # 18
Which statement is correct about OSPF?
- A. OSPF is a path-vector protocol
- B. OSPF is link-state protocol
- C. OSPF is a distance-vector protocol
- D. OSPF is a device-state protocol
Answer: B
NEW QUESTION # 19
EVPN/VXLAN is primarily used in modern data centers to:
- A. Increase the physical distance between data centers.
- B. Enhance the physical security of the data center.
- C. Provide Layer 2 connectivity over a Layer 3 network.
- D. Replace traditional routing protocols.
Answer: C
NEW QUESTION # 20
Referring to the exhibit, how many milliseconds will pass before the BGP neighbor is considered dead?
- A. 1000ms
- B. 3000ms
- C. 9000ms
- D. 2000ms
Answer: B
NEW QUESTION # 21
Generated routes in a network are mainly used to:
- A. Reduce the overall size of the routing table.
- B. Automatically create a route when a specified condition is met.
- C. Manually configure specific network routes.
- D. Summarize external routes into the network.
Answer: B
NEW QUESTION # 22
What is the primary function of a VLAN?
- A. To control network traffic based on MAC addresses.
- B. To encrypt network traffic.
- C. To segment a network into multiple broadcast domains.
- D. To provide a routing mechanism between different networks.
Answer: C
NEW QUESTION # 23
What is the primary purpose of using static routes in a network?
- A. To generate routing entries dynamically
- B. To aggregate multiple routes into one
- C. To automatically adjust routes based on network traffic
- D. To provide a manually configured routing entry
Answer: D
NEW QUESTION # 24
In OSPF, how is the Router ID determined?
- A. By the highest loopback interface IP address.
- B. By the highest IP address on any of the router's active interfaces.
- C. By a manually configured value in the router configuration.
- D. By the lowest MAC address of the router.
Answer: A
NEW QUESTION # 25
Referring to the exhibit, how many stages are in this IP fabric?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 26
VLANs help in reducing which of the following? (Choose two)
- A. Collision domains
- B. Broadcast domains
- C. Encryption requirements
- D. Routing complexity
Answer: A,B
NEW QUESTION # 27
What is the first route selection mechanism for IBGP?
- A. MED
- B. local preference
- C. as path
- D. origin
Answer: B
NEW QUESTION # 28
Which of the following are correct about OSPF router ID selection? (Choose two)
- A. It is chosen based on the highest IP address of any active interface by default.
- B. It is always the IP address of the loopback interface.
- C. It can be manually configured.
- D. It is selected based on the lowest MAC address.
Answer: A,C
NEW QUESTION # 29
What happens if a frame with a known destination MAC address enters a switch?
- A. The MAC address is added to the bridge table.
- B. The ingress PFE sends the header information to the RE.
- C. The ingress PFE performs a MAC address lookup and determines the egress PFE and port.
- D. The egress PFE performs a MAC address lookup and determines the ingress PFE and port.
Answer: C
NEW QUESTION # 30
What are two characteristics of a typical EBGP underlay fabric? (Choose two.)
- A. Each device in an EBGP fabric will be configured to be part of the same private AS.
- B. An EBGP fabric relies on an IGP to advertise loopback IPs.
- C. An EBGP fabric does not require an IGP to advertise loopback IPs.
- D. Each device in an EBGP fabric will be configured in its own unique private AS.
Answer: C,D
NEW QUESTION # 31
Which OSPF packet types are used to establish and maintain neighbor relationships? (Choose two)
- A. Database Description packets
- B. Link State Request packets
- C. Hello packets
- D. Link State Update packets
Answer: A,C
NEW QUESTION # 32
What type of BGP is used for routing within the same autonomous system?
- A. EBGP
- B. IBGP
- C. Dynamic BGP
- D. Static BGP
Answer: B
NEW QUESTION # 33
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