Data Center, Associate (JNCIA-DC) JN0-280 Dumps
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Data Center, Associate (JNCIA-DC)
The Data Center track enables you to demonstrate competence with data center technologies and related configuration and troubleshooting skills. JNCIA-DC, the associate-level certification in this track, is designed for data center networking professionals with introductory-level knowledge of the Juniper Networks Junos software and data center devices. The written exam verifies your understanding of data center technologies, related platform configuration, and troubleshooting skills.
Exam Details
Exam Code: JN0-280
Prerequisite Certification: None
Delivered by Pearson VUE
Exam Length: 90 minutes
Exam Type: 65 multiple-choice questions
Software Versions: Junos 20.4
Exam Objectives
Data Center Architectures
Identify concepts and general features of Data Center architectures
Traditional Architectures (multi-tier)
IP-Fabric Architectures (Spine/Leaf)
Layer 2 and Layer 3 strategies
Overlay Network versus Underlay Network (Very Basic)
EVPN/VXLAN basics/purpose
Layer 2 Switching, VLANs and Security
Identify the concepts, operation, or functionality of Layer 2 switching for the Junos OS
Ethernet switching/bridging concepts and operations
Identify the concepts, benefits, or functionality of VLANs
Port modes
VLAN Tagging
IRB
Identify the concepts, benefits, or functionality of Layer 2 Security
MACsec
MAC address control/filtering
Storm Control
Describe how to configure, monitor, or troubleshoot Layer 2 switching, VLANs, or security
Ethernet switching/bridging
VLANs
Layer 2 security features
Protocol-Independent Routing
Identify the concepts, operation, or functionality of various protocol-independent routing components
Static, aggregate, and generated routes
Martian addresses
Routing instances, including RIB groups
Load balancing
Filter-based forwarding
Describe how to configure, monitor, or troubleshoot various protocol-independent routing components
Static, aggregate, and generated routes
Load balancing
Data Center Routing Protocols BGP/OSPF
Identify the concepts, operation, or functionality of OSPF
Link-state database
OSPF packet types
Router ID
Adjacencies and neighbors
Designated router (DR) and backup designated router (BDR)
OSPF area and router types
LSA packet types
Describe how to configure, monitor, or troubleshoot OSPF
Areas, interfaces, and neighbors
Additional basic options
Routing policy application
Troubleshooting tools
Identify the concepts, operation, or functionality of BGP
BGP basic operation
BGP message types
Attributes
Route/path selection process
IBGP and EBGP functionality and interaction
Describe how to configure, monitor, or troubleshoot BGP
Groups and peers
Additional basic options
Routing policy application
High Availability (HA)
Identify the concepts, benefits, applications, or requirements of high availability
Link aggregation groups (LAG)
Graceful restart (GR)
Bidirectional Forwarding Detection (BFD)
Virtual Chassis
Describe how to configure, monitor, or troubleshoot high availability components
Link aggregation groups (LAG)
Graceful restart (GR)
Bidirectional Forwarding Detection (BFD)
Share Data Center, Associate (JNCIA-DC) JN0-280 Free Dumps
1. What are two common reasons for BGP routes to be in the hidden state? (Choose two.)
A. Routes are being rejected by a policy
B. Routes are being filtered from the inet.2 routing table
C. The next hop is unresolvable
D. The BGP neighbor is in a different autonomous system
Answer: A, C
2. You have configured a load balancing policy. Which statement is correct about applying the policy?
A. The policy is applied as an export policy under the routing protocol’s hierarchy.
B. The policy is applied as an export policy under routing-options forwarding table.
C. The policy is applied as an import policy under the routing protocol’s hierarchy.
D. The policy is applied as an import policy under routing-options forwarding table.
Answer: B
3. Under which Junos hierarchy is a static route configured?
A. system
B. routing-instances
C. routing-options
D. protocols
Answer: C
4. How does a layer 2 switch populate its bridge table?
A. It stores the protocol number of frames traversing the network.
B. It stores both the source and destination MAC addresses of frames traversing the network.
C. It stores the destination MAC address of frames traversing the network.
D. It stores the source MAC address of frames traversing the network.
Answer: D
5. 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 discards the frame.
B. It floods the frame out of all ports except the one it was received on.
C. It sends the frame to its default gateway.
D. It buffers the frame until the MAC address can be learned.
Answer: B
6. Which two protocols can you use for a data center underlay network? (Choose two)
A. EBGP
B. OSPF
C. VXLAN
D. EVPN
Answer: A, B
7. In the context of data center networking, what is the primary purpose of an Underlay Network?
A. To provide a physical infrastructure for an Overlay Network.
B. To handle external network connections exclusively.
C. To facilitate virtual machine migrations.
D. To encrypt data traffic between servers.
Answer: A
8. 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.
Answer: A, D
9. 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.
Answer: B
10. 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 specify which interfaces are members of a specific aggregated Ethernet bundle.
D. You must enable LACP when configuring aggregated Ethernet bundles.
Answer: A, C
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