[UPDATED Nov-2024] Best Value Available Preparation Guide for JN0-280 Exam
1 Full JN0-280 Practice Test and 120 Unique Questions, Get it Now!
NEW QUESTION # 31
Which type of route is used to represent a summary of multiple smaller networks?
- A. Static route
- B. Aggregate route
- C. Generated route
- D. Dynamic route
Answer: B
NEW QUESTION # 32
In OSPF, how is the Router ID determined?
- A. By the highest loopback interface IP address.
- B. By the lowest MAC address of the router.
- C. By a manually configured value in the router configuration.
- D. By the highest IP address on any of the router's active interfaces.
Answer: A
NEW QUESTION # 33
What happens if a frame with a known destination MAC address enters a switch?
- A. The ingress PFE performs a MAC address lookup and determines the egress PFE and port.
- B. The egress PFE performs a MAC address lookup and determines the ingress PFE and port.
- C. The ingress PFE sends the header information to the RE.
- D. The MAC address is added to the bridge table.
Answer: A
NEW QUESTION # 34
Which statement is correct about an IP fabric?
- A. Load sharing is provided by the routing protocol used.
- B. The entire IP fabric is one large broadcast domain.
- C. Transit traffic is passed through the network based on the original frame's destination MAC address.
- D. Loop prevention is provided by the underlying spanning tree protocol used.
Answer: A
NEW QUESTION # 35
Referring to the exhibit, how many collision domains are present in the topology?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 36
Which EBGP feature must be used when peering to a non-directly connected peer address?
- A. multihop
- B. AS path
- C. multipath
- D. local preference
Answer: A
NEW QUESTION # 37
With regards to graceful restart, which two statements are true? (Choose two.)
- A. Dual routing engines are required for graceful restart to work.
- B. The network topology must be stable for graceful restart to work.
- C. NSR must be enabled for graceful restart to work.
- D. A supported routing protocol, such as BGP, must be operational for graceful restart to work.
Answer: B,D
NEW QUESTION # 38
Which of the following are functions of MACsec? (Choose two)
- A. It prevents MAC flooding attacks.
- B. It enables VLAN tagging.
- C. It provides Layer 2 encryption.
- D. It offers data integrity and confidentiality.
Answer: C,D
NEW QUESTION # 39
What statement is true about load-balancing?
- A. Load balancing is only supported after applying an advanced license.
- B. Load balancing is only supported by dynamic routing protocols.
- C. Load balancing on Juniper devices is processed per-packet.
- D. Load balancing on Juniper devices is processed per-flow.
Answer: D
NEW QUESTION # 40
EVPN/VXLAN is primarily used in modern data centers to:
- A. Provide Layer 2 connectivity over a Layer 3 network.
- B. Replace traditional routing protocols.
- C. Enhance the physical security of the data center.
- D. Increase the physical distance between data centers.
Answer: A
NEW QUESTION # 41
When configuring High Availability components, which of the following practices are recommended? (Choose two)
- A. Implement regular testing of failover mechanisms.
- B. Regularly update firmware to non-recommended versions.
- C. Use a single path for data and control traffic.
- D. Ensure physical redundancy of critical components.
Answer: A,D
NEW QUESTION # 42
In the Junos OS, what is the default behavior of a switch when it receives a frame with an unknown destination MAC address?
- A. It buffers the frame until the MAC address can be learned.
- B. It floods the frame out of all ports except the one it was received on.
- C. It discards the frame.
- D. It sends the frame to its default gateway.
Answer: B
NEW QUESTION # 43
How does VLAN tagging benefit network segmentation?
- A. By ensuring the same IP address range can be used in different VLANs.
- B. By enabling the identification and separation of traffic belonging to different VLANs.
- C. By encrypting data traffic between VLANs.
- D. By providing a backup path for data in case of link failure.
Answer: B
NEW QUESTION # 44
In the context of Ethernet bridging on Junos devices, what is the purpose of the Spanning Tree Protocol (STP)?
- A. To prevent Layer 2 switching loops.
- B. To provide a mechanism for VLAN tagging.
- C. To prevent routing loops.
- D. To filter MAC addresses.
Answer: A
NEW QUESTION # 45
What is a key characteristic of traditional multi-tier data center architectures?
- A. They primarily use a flat network design.
- B. They are organized in a hierarchical model with distinct layers.
- C. They exclusively use Layer 3 routing.
- D. They consist of a modular, scalable design.
Answer: B
NEW QUESTION # 46
What is Integrated Routing and Bridging (IRB) primarily used for in a Junos device?
- A. For aggregating multiple interfaces.
- B. To provide inter-VLAN routing.
- C. For implementing security policies.
- D. To separate VLAN traffic.
Answer: B
NEW QUESTION # 47
Which two statements are correct about aggregated Ethernet bundles? (Choose two.)
- A. You must enable the chassis to support aggregated Ethernet interfaces.
- B. You must purchase a services license for the chassis to support aggregate Ethernet interfaces.
- C. You must enable LACP when configuring aggregated Ethernet bundles.
- D. You must specify which interfaces are members of a specific aggregated Ethernet bundle.
Answer: A,D
NEW QUESTION # 48
In a Virtual Chassis configuration, which of the following is true?
- A. It reduces the operational complexity of managing multiple switches.
- B. It allows physical stacking of switches that are geographically dispersed.
- C. It decreases network redundancy and reliability.
- D. Only two switches can be connected in a Virtual Chassis setup.
Answer: A
NEW QUESTION # 49
Referring to the exhibit, what needs to be done to make this a valid IP fabric?
- A. Remove the connection between the leaf nodes
- B. Add two connections between the spine nodes
- C. Remove one of the redundant links between a leaf node and a spine node
- D. Add a connection between the spine nodes
Answer: A
NEW QUESTION # 50
Which Junos operational mode command is used to troubleshoot issues with VLANs?
- A. show interfaces
- B. show ethernet-switching table
- C. monitor traffic
- D. show vlans
Answer: B
NEW QUESTION # 51
Bidirectional Forwarding Detection (BFD) is primarily used for:
- A. Quick failure detection in forwarding paths
- B. Aggregating multiple links
- C. Encrypting data packets
- D. Detecting slow links in the network
Answer: A
NEW QUESTION # 52
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