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The JNCIA-DC exam is a vendor-neutral certification that covers a range of topics related to data center technologies. JN0-280 exam is designed to test the candidate’s understanding of data center technologies, including networking, storage, and virtualization. It also covers topics such as data center architecture, data center operations, and data center security.
NEW QUESTION # 34
Filter-based forwarding is typically used to:
- A. Optimize the routing table size.
- B. Increase the security of the routing process.
- C. Automatically generate routing entries.
- D. Implement policy-based routing decisions.
Answer: D
NEW QUESTION # 35
Which of the following are true about Layer 2 and Layer 3 strategies in data center architectures? (Choose two)
- A. Layer 2 strategies are typically used for creating large, flat networks.
- B. Layer 3 strategies help in reducing broadcast domains.
- 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 # 36
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 # 37
What does the qualified-next-hop feature do when configuring a static route?
- A. It specifies the IP address of the directly connected device.
- B. It allows you to specify an independent route preference value for an additional next hop.
- C. It instructs the device to verify the next-hop is reachable before activating the route.
- D. It instructs the device to looks up a static route s next-hop that is not directly connected.
Answer: B
NEW QUESTION # 38
What is a common issue to check for when troubleshooting a LAG not forming correctly?
- A. Mismatched VLAN configurations
- B. Overutilization of CPU resources
- C. Excessive broadcast traffic
- D. Identical IP addresses on all LAG interfaces
Answer: A
NEW QUESTION # 39
Which statement is correct about an IP fabric?
- A. Loop prevention is provided by the underlying spanning tree protocol used.
- B. Transit traffic is passed through the network based on the original frame's destination MAC address.
- C. The entire IP fabric is one large broadcast domain.
- D. Load sharing is provided by the routing protocol used.
Answer: D
NEW QUESTION # 40
What is the first route selection mechanism for IBGP?
- A. origin
- B. local preference
- C. as path
- D. MED
Answer: B
NEW QUESTION # 41
What is the primary use of a virtual link in OSPF?
- A. To connect an OSPF area to the backbone area through a non-backbone area.
- B. To balance load across multiple links.
- C. To encrypt OSPF traffic.
- D. To connect OSPF areas to external networks.
Answer: A
NEW QUESTION # 42
Referring to the exhibit, which two statements are true? (Choose two.)
- A. The configuration will pass the commit check.
- B. The BGP group is configured to attempt an EBGP peering session with 192.168.100.2.
- C. The configuration will not pass the commit check.
- D. The BGP group is configured to attempt an EBGP peering session with 192.168.100.1.
Answer: B,C
NEW QUESTION # 43
Fill in the blank: In BGP, the ___________ attribute is used to influence the best path selection process.
- A. MED (Metric or Multi-Exit Discriminator)
- B. AS_PATH
- C. Community
- D. Local Preference
Answer: A
NEW QUESTION # 44
Which two prefixes are contributing routes to a 10.20.0.0/18 aggregate route? (Choose two)
- A. 10.20.60.0/23
- B. 10.20.0.0/24
- C. 10.20.100.0/24
- D. 10.20.0.0/16
Answer: A,B
NEW QUESTION # 45
Generated routes in a network are mainly used to:
- A. Reduce the overall size of the routing table.
- B. Summarize external routes into the network.
- C. Automatically create a route when a specified condition is met.
- D. Manually configure specific network routes.
Answer: C
NEW QUESTION # 46
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 a Cisco-specific attribute used to prefer paths from one BGP speaker over another, evaluated before the Local Preference.
- C. It determines the stability of a route and is checked after the Local Preference attribute.
- D. It is used to balance load among multiple links and is considered after the MED attribute.
Answer: B
NEW QUESTION # 47
Which two statement are correct about trunk ports? (Choose two.)
- A. Trunk ports typically connect to end users and servers.
- B. By default, trunk ports can transmit and receive VLAN tagged traffic.
- C. Trunk ports typically connect to other switches and routers.
- D. By default, trunk ports can transmit and receive untagged traffic.
Answer: B,C
NEW QUESTION # 48
Why is EVPN often used in conjunction with VXLAN in modern data centers?
- A. To physically separate different customer environments.
- B. To enable direct Internet access for applications.
- C. To increase the physical bandwidth of the underlying network.
- D. For providing Layer 2 connectivity over a Layer 3 fabric.
Answer: D
NEW QUESTION # 49
In the context of Link Aggregation Groups (LAG), what is the primary purpose of LACP?
- A. To reduce the speed of data transfer
- B. To increase the error rate in data transmission
- C. To provide a method for encrypting data packets
- D. To dynamically manage the bundling of several physical ports
Answer: D
NEW QUESTION # 50
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 the lowest MAC address of the router.
- D. By a manually configured value in the router configuration.
Answer: A
NEW QUESTION # 51
In Ethernet switching, what is the primary function of a storm control policy?
- A. To segregate broadcast domains.
- B. To filter MAC addresses.
- C. To restrict the rate of certain types of traffic.
- D. To prevent loops in the network.
Answer: C
NEW QUESTION # 52
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. Dual routing engines are required for graceful restart to work.
- C. NSR must be enabled for graceful restart to work.
- D. The network topology must be stable for graceful restart to work.
Answer: A,D
NEW QUESTION # 53
Which two statements are correct about using LACP on a Junos device? (Choose two.)
- A. LACP is used to automatically add and delete interfaces from aggregated Ethernet bundles on a Junos device.
- B. LACP is used to monitor the status of an aggregated Ethernet bundle's member interfaces on a Junos device.
- C. Both sides of the LACP session must be in active mode to exchange LACP packets on a Junos device.
- D. One side of the LACP session must be in active mode to exchange LACP packets on a Junos device.
Answer: B,D
NEW QUESTION # 54
In OSPF, which term refers to routers that have interfaces in multiple areas?
- A. Area Border Routers (ABRs)
- B. Internal Routers
- C. Backbone Routers
- D. Autonomous System Boundary Routers (ASBRs)
Answer: A
NEW QUESTION # 55
Which VLAN tagging method inserts a 4-byte tag into the Ethernet frame?
- A. MPLS
- B. ISL
- C. Dot1Q
- D. Q-in-Q
Answer: C
NEW QUESTION # 56
In Junos, which command is used to display the status of all interfaces?
- A. show vlan brief
- B. show ethernet-switching table
- C. show interfaces descriptions
- D. show interfaces terse
Answer: D
NEW QUESTION # 57
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