[Oct-2021] JN0-681 Pre-Exam Practice Tests | Exam Questions and Answers for JNCIP-DC Study Guide
Data Center, Professional (JNCIP-DC) Certification Sample Questions
NEW QUESTION 27 
You are deploying MC-LAG as shown in the exhibit.
Which statement is correct when using active/standby mode?
- A. All traffic from Server A to Host 1 will traverse the link between Server A and ex2.
- B. VCCP is used to exchange MAC addresses between MC-LAG peers.
- C. A spanning tree protocol should be used to avoid Layer 2 loops between Server A and both switches.
- D. Only ICCP control traffic is allowed through the ICL-PL connection.
Answer: A
NEW QUESTION 28
When QFX5100 series and EX4300 series are in a Virtual Chassis, which two statements are true? (Choose two.)
- A. The scale capacity of each switch is dependent on the model of the switch.
- B. The Virtual Chassis stack scales down to the lowest maximum scaling number between members.
- C. QFX5100 and EX4300 switches do not form a virtual chassis with each other by default.
- D. The Virtual Chassis stack scales up to the highest maximum scaling number between members.
Answer: B,C
NEW QUESTION 29 
You are deploying MC-LAG as shown in the exhibit.
Which statement is correct when using active/active mode?
- A. VCCP is used to exchange MAC addresses between MC-LAG peers.
- B. ICCP and block filters are used to avoid Layer 2 loops.
- C. Only ICCP control traffic is allowed through the ICL-PL connection
- D. VRRP must be used to ensure MAC addresses are shared between peers.
Answer: B
NEW QUESTION 30
Which statement is correct about EVPN Type 2 routers?
- A. An EVPN Type 2 route prevents the need to advertise host IP reachability.
- B. An EVPN Type 2 route disables MAC flowing to remote hosts.
- C. An EVPN Type 2 route allows data plane-based host MAC learning.
- D. An EVPN Type 2 route provides local proxy-arp for remote hosts.
Answer: C
NEW QUESTION 31
You are logged in to Leaf 1. When examining the routing table, you notice that you have no routes from Leaf 2.
Referring to the exhibit, which two commands would you use to troubleshoot the problem? (Choose two.)
- A. From Leaf 1, issue the show route receive-protocol bgp 172.16.1.1 command.
- B. From Spine 1, issue the show route advertising-protocol bgp 172.16.1.2 command.
- C. From Leaf 2, issue the show route advertising-protocol bgp 172.16.1.2 command.
- D. From Spine 1, issue the show route advertising-protocol bgp 172.16.1.1 command.
Answer: A,B
NEW QUESTION 32
Which two technologies provide Layer 2 services across data centers in two remote locations? (Choose two.)
- A. MSDP
- B. L3VPN
- C. EVPN
- D. VPLS
Answer: C,D
NEW QUESTION 33
You have configured MP-IBGP to support EVPN for your overlay network.
However, you are not seeing the expected routes on your edge devices.
Referring to the exhibit, how would you solve this problem?
- A. The family 12vpn signalingmust be configured on the local peer.
- B. The group types on both devices should be set to external.
- C. The family evpn signalingparameter must be configured on the remote peer.
- D. Graceful restart must be disabled for this session.
Answer: C
NEW QUESTION 34
You are configuring an IP Fabric in your data center and you are trying to load-balance traffic across multiple equal-cost BGP routes.
You have enabled multipath, but the traffic is not being load-balanced.
Referring to the exhibit, what will solve this problem?
- A. You should apply the load-balance policy as an export policy to the forwarding table.
- B. You should apply the load-balance policy as an import policy to the forwarding table.
- C. You should apply the load-balance policy as an export policy to the BGP neighbor.
- D. You should apply the load-balance policy as an import policy for the BGP neighbor.
Answer: A
NEW QUESTION 35
You are configuring VXLAN on a network of QFX5100s, and are using the set vlans vlan100 vxlan unreachable-vtep-aging-timer 600 command.
What does this command do?
- A. This command ages out a remotely learned VTEP address after 600 seconds of inactivity.
- B. This command ages out all learned MAC addresses assigned to the VTEP after 600 seconds of inactivity.
- C. This command ages out a locally learned MAC address assigned to the VTEP after 600 seconds of inactivity.
- D. This command ages out the address of the remote VTEP 600 seconds after the last learned MAC address expires.
Answer: D
NEW QUESTION 36
You are designing a network for a small data center. In this scenario, which underlay protocol allows for the simplest implementation?
- A. EBGP
- B. IBGP
- C. MPLS
- D. OSPF
Answer: A
NEW QUESTION 37
Which two statements are true regarding IP fabrics?
- A. An IP fabric uses standby links for redundancy.
- B. An IP fabric load balances across links for redundancy.
- C. An IP fabric uses routing protocols to avoid loops.
- D. An IP fabric uses Spanning Tree Protocol to avoid loops.
Answer: B,C
NEW QUESTION 38
Referring to the exhibit, not all routes are being exchanged by EBGP peers.
In this scenario, which BGP parameter would solve this problem?
- A. multihop
- B. multipath
- C. multipath multiple-as
- D. as-override
Answer: D
NEW QUESTION 39
Which statement is true for an IP Fabric to be called a Clos IP Fabric?
- A. Spine devices must be connected in a full mesh.
- B. The protocol used is OSPF, IS-IS, or BGP.
- C. Spanning tree must be completely eliminated.
- D. The number of uplinks from a leaf device equals the number of spine devices.
Answer: A
NEW QUESTION 40
You have deployed a VXLAN as shown in the exhibit Leaf1, leaf3, spine1, and spine2 have been configured as VTEPs. Host1 cannot communicate with host2.
Referring to the exhibit, how would you solve this problem?
- A. A DCI connection must be created between the VLANs.
- B. The VLAN ID on the link connected to host2 must be changed to VLAN 100.
- C. Host1 and host2 must be placed in the same VRF.
- D. A Layer 3 VXLAN gateway must be configured on at least one of the devices.
Answer: D
NEW QUESTION 41
You want to ensure high availability of the Junos devices in your data center.
In this scenario, which three features would accomplish this task? (Choose three.)
- A. graceful Routing Engine switchover
- B. Multiple Spanning Tree Protocol
- C. virtual private LAN service
- D. Virtual Router Redundancy Protocol
- E. dual Routing Engines
Answer: A,D,E
NEW QUESTION 42
When using EBGP as the underlay protocol for your IP fabric architecture, which two statements are true? (Choose two.)
- A. Leaf nodes peer to both spine and leaf nodes.
- B. Leaf nodes only peer to spine nodes.
- C. Spine nodes peer to both leaf and spine nodes.
- D. Spine nodes only peer to leaf nodes.
Answer: B,D
NEW QUESTION 43
You are configuring VXLAN. and you must ensure that all switches for the multicast groups advertise their existence and learn about other VTEPs In this scenario. which protocol will accomplish this task?
- A. BOP
- B. EVPN
- C. OSPF
- D. PIM
Answer: B
NEW QUESTION 44
What are three advantages of using MPLS for data center interconnects? (Choose three.)
- A. any-to-any connectivity
- B. dedicated MPLS backbones for Layer 2 and Layer 3 DCIs
- C. sub 50 ms failover times
- D. traffic engineering
- E. dedicated connections between customer sites
Answer: B,C,D
NEW QUESTION 45 
Spine 1 and Spine 2 are MX Series devices configured to act as redundant VXLAN Layer 3 Gateways using the virtual-gateway-address 10.0.1.254 statement,
Referring to the exhibit, how will a spine node react to receiving the ARP request from Host A?
- A. The spine node will send an ARP reply specifying a virtual MAC address of 00:00:5e:00:01:01.
- B. The spine node will send an ARP reply specifying the MAC address of its leaf-facing interface.
- C. The spine node will send an ARP reply specifying the MAC address of its LT interface.
- D. The spine node will send an ARP reply specifying the MAC address of its IRB interface.
Answer: A
NEW QUESTION 46
Referring to the exhibit, Host 1 and Host 3 have exchanged traffic.
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In this scenario, which statement is true?
- A. Leaf 2 learn Host 1's MAC address when Host 3 learns Host 1's MAC address.
- B. Leaf 2 learn Host 1's MAC address through periodic updates from Spine 2
- C. Leaf 2 learn Host 1's MAC address when Leaf 1 queries Host 1.
- D. Leaf 2 does not learn Host 1's MAC address until Host1 and Host2 send traffic to each other
Answer: C
NEW QUESTION 47
Referring to the exhibit, Host 1 and Host 3 have exchanged traffic.
`
In this scenario, which statement is true?
- A. Leaf 2 learns Host 1's MAC address through periodic updates from Spine 2.
- B. Leaf 2 does not learn Host 1's MAC address until Host 1 and Host 2 send traffic to each other.
- C. Leaf 2 learns Host 1's MAC address when Leaf 1 queries Host 1.
- D. Leaf 2 learns Host 1's MAC address when Host 3 learns Host 1's MAC address.
Answer: C
NEW QUESTION 48
You are asked to design a deployment plan for a large number of QFX Series switches using ZTP. The ZTP deployment plan must ensure all switches are configured with their designated configuration file.
Which DHCP option and subscription combination would be used to accomplish this task?
- A. DHCP option 43 a suboption of 00.
- B. DHCP option 66 a suboption of 01.
- C. DHCP option 66 a suboption of 00.
- D. DHCP option 43 a suboption of 01.
Answer: A
NEW QUESTION 49
You are building an EVPN Data Center Interconnect. You must support multiple VLANs in a single EVPN instance.
Which parameter provides this functionality?
- A. instance-type evpn
- B. instance-type 12vpn
- C. instance-type no-forwarding
- D. instance-type virtual-switch
Answer: D
NEW QUESTION 50
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