Juniper JN0-280 Data Center, Associate (JNCIA-DC) Online Training
Juniper JN0-280 Online Training
The questions for JN0-280 were last updated at Nov 01,2025.
- Exam Code: JN0-280
- Exam Name: Data Center, Associate (JNCIA-DC)
- Certification Provider: Juniper
- Latest update: Nov 01,2025
Question #31
Which statement is correct about the OSPF link-state database?
- A . Each router within the same area must maintain a unique copy of the link-state database.
- B . Each router within the same area must maintain an identical copy of the link-state database.
- C . Each router within the OSPF domain must maintain a unique copy of the link-state database.
- D . Each router within the OSPF domain must maintain an identical copy of the link-state database.
Question #32
In a Spine/Leaf IP-Fabric architecture, what is the primary role of the leaf switches?
- A . To provide direct connectivity to servers.
- B . To interconnect different data centers.
- C . To perform deep packet inspection.
- D . To manage the overall data center network.
Question #33
What is the primary function of a VLAN?
- A . To encrypt network traffic.
- B . To provide a routing mechanism between different networks.
- C . To segment a network into multiple broadcast domains.
- D . To control network traffic based on MAC addresses.
Question #34
What roles do the Designated Router (DR) and Backup Designated Router (BDR) play in OSPF?
- A . They redistribute routes between OSPF and non-OSPF networks.
- B . They are responsible for generating LSAs for external routes.
- C . They reduce the number of adjacencies on broadcast networks.
- D . They determine the shortest path first algorithm.
Question #35
Which two statements are correct about BGP? (Choose two.)
- A . IBGP peers do not advertise routes learned from IBGP peers to other IBGP peers.
- B . EBGP uses the AS path to avoid loops.
- C . IBGP sessions are typically established between physical router interfaces.
- D . EBGP sessions are typically established between router loopback interfaces.
Question #36
Which of the following are correct about OSPF router ID selection? (Choose two)
- A . It can be manually configured.
- B . It is chosen based on the highest IP address of any active interface by default.
- C . It is always the IP address of the loopback interface.
- D . It is selected based on the lowest MAC address.
Question #37
EVPN/VXLAN is primarily used in modern data centers to:
- A . Increase the physical distance between data centers.
- B . Provide Layer 2 connectivity over a Layer 3 network.
- C . Replace traditional routing protocols.
- D . Enhance the physical security of the data center.
Question #38
With regards to graceful restart, which two statements are true? (Choose two.)
- A . A supported routing protocol, such as BGP, must be operational for graceful restart to work.
- B . NSR must be enabled for graceful restart to work.
- C . Dual routing engines are required for graceful restart to work.
- D . The network topology must be stable for graceful restart to work.
Question #39
Which command on a router is used to view the current routing table?
- A . show routing-table
- B . show route
- C . display ip routing-table
- D . check route information
Question #40
What does filter-based forwarding in networking typically allow?
- A . Forwarding decisions based on MAC addresses
- B . Load balancing across multiple CPUs
- C . Routing decisions based on extended criteria like packet headers
- D . Aggregation of multiple routes into a single entry
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