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Pass JNCIA-DC JN0-280 Exam With 120 Questions
NEW QUESTION # 19
What does filter-based forwarding in networking typically allow?
- A. Aggregation of multiple routes into a single entry
- B. Load balancing across multiple CPUs
- C. Routing decisions based on extended criteria like packet headers
- D. Forwarding decisions based on MAC addresses
Answer: C
NEW QUESTION # 20
Which OSPF router type connects an OSPF area to non-OSPF networks?
- A. Area Border Router (ABR)
- B. Backbone Router
- C. Internal Router
- D. Autonomous System Boundary Router (ASBR)
Answer: D
NEW QUESTION # 21
Referring to the exhibit, which two statements are correct about the IP fabric? (Choose two.)
- A. Only traffic between pods must traverse the super spine devices.
- B. This is a three-stage IP fabric.
- C. All traffic must traverse the super spine devices.
- D. This is a five-stage fabric.
Answer: A,D
NEW QUESTION # 22
What is the primary purpose of MAC address filtering on a switch?
- A. To control the flow of encrypted data.
- B. To prevent unauthorized devices from accessing the network.
- C. To distribute traffic evenly across multiple links.
- D. To limit the rate of incoming packets.
Answer: B
NEW QUESTION # 23
Why is EVPN often used in conjunction with VXLAN in modern data centers?
- A. To physically separate different customer environments.
- B. To increase the physical bandwidth of the underlying network.
- C. To enable direct Internet access for applications.
- D. For providing Layer 2 connectivity over a Layer 3 fabric.
Answer: D
NEW QUESTION # 24
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 # 25
What is an advantage of using BFD?
- A. BFD is so lightweight that each protocol will generate its own unique BFD session by default, to replace its own hello messages.
- B. BFD is built to handle the routing table of the entire Internet, unlike IGPS.
- C. One BFD monitoring session can be used by multiple protocols.
- D. BFD built to handle the routing table of the entire Internet, and can safely redistribute it into OSPF.
Answer: C
NEW QUESTION # 26
What does VXLAN stand for in the context of EVPN/VXLAN?
- A. Virtualized Ethernet VPN
- B. Virtual X-Series LAN
- C. Virtual Extensible VLAN
- D. Very Extended Virtual LAN
Answer: C
NEW QUESTION # 27
Which OSPF packet types are used to establish and maintain neighbor relationships? (Choose two)
- A. Link State Update packets
- B. Hello packets
- C. Link State Request packets
- D. Database Description packets
Answer: B,D
NEW QUESTION # 28
What is the main advantage of using an Overlay Network in a data center?
- A. It provides direct Internet access to applications.
- B. It simplifies physical network design by allowing multiple virtual topologies over it.
- C. It replaces the need for physical network infrastructure.
- D. It offers higher physical bandwidth capacity.
Answer: B
NEW QUESTION # 29
In Junos, which command is used to display the status of all interfaces?
- A. show interfaces descriptions
- B. show vlan brief
- C. show ethernet-switching table
- D. show interfaces terse
Answer: D
NEW QUESTION # 30
What is the main advantage of using MACsec?
- A. It allows for the use of longer cable runs.
- B. It provides Layer 2 encryption for data confidentiality and integrity.
- C. It creates multiple virtual networks over a single physical infrastructure.
- D. It increases the speed of the network.
Answer: B
NEW QUESTION # 31
What is the primary purpose of OSPF in network routing?
- A. To encrypt data traffic between different networks.
- B. To provide path vector routing within an autonomous system.
- C. To offer dynamic routing within an autonomous system using link-state information.
- D. To redistribute routes between autonomous systems.
Answer: C
NEW QUESTION # 32
What type of BGP is used for routing within the same autonomous system?
- A. Dynamic BGP
- B. Static BGP
- C. IBGP
- D. EBGP
Answer: C
NEW QUESTION # 33
When configuring High Availability components, which of the following practices are recommended? (Choose two)
- A. Implement regular testing of failover mechanisms.
- B. Ensure physical redundancy of critical components.
- C. Use a single path for data and control traffic.
- D. Regularly update firmware to non-recommended versions.
Answer: A,B
NEW QUESTION # 34
Which two statements are correct about aggregated Ethernet bundles? (Choose two.)
- A. You must specify which interfaces are members of a specific aggregated Ethernet bundle.
- B. You must enable LACP when configuring aggregated Ethernet bundles.
- C. You must purchase a services license for the chassis to support aggregate Ethernet interfaces.
- D. You must enable the chassis to support aggregated Ethernet interfaces.
Answer: A,D
NEW QUESTION # 35
What is the function of the 'Weight' attribute in BGP, and where is it used in the route selection process?
- A. It is used to prioritize routes received from different EBGP peers and is considered before the AS_PATH attribute.
- B. It is used to balance load among multiple links and is considered after the MED attribute.
- C. It determines the stability of a route and is checked after the Local Preference attribute.
- D. It is a Cisco-specific attribute used to prefer paths from one BGP speaker over another, evaluated before the Local Preference.
Answer: D
NEW QUESTION # 36
What is the purpose of using route reflectors in BGP?
- A. To increase the speed of BGP convergence
- B. To automatically select the best route
- C. To encrypt BGP messages
- D. To reduce the number of required IBGP sessions in a network
Answer: D
NEW QUESTION # 37
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