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Juniper JN0-681 Exam Dumps
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Juniper JNCIP-DC JN0-681 Practice Test 1-13
QUESTION 1
You are designing a Layer 3 fabric underlay using EBGP. You will implement an EVPN-signaled VXLAN overlay on the
Layer 3 fabric.
In this scenario, what must you do in the underlay to ensure that the VXLAN overlay will be able to function properly?
A. The underlay should advertise the host-connected interfaces on all leaf devices.
B. Each device in the underlay should advertise its loopback address.
C. The underlay should be configured with a separate VRF for each potential tenant.
D. The underlay should support the PIM protocol.
Correct Answer: B
QUESTION 2
Referring to the exhibit, each node in the IP fabric is peering to its directly attached neighbor using EBGP. Each node is
peering using physical interface IP addresses. Leaf 2 and Leaf 3 are advertising the 10.1.1/24 network into EBGP.
Spine 2 must be configured so that it can load-share traffic destined to the 10 1.1/24 network over both next-hop A and
next-hop B.
Which two actions must be performed to accomplish this task? (Choose two.)
A. Use a load-balancing policy applied to the forwarding table.
B. Use multipath multiple-AS.
C. Use advertise-inactive.
D. Use multihop.
Correct Answer: AB
QUESTION 3
When using EBGP as the underlay protocol for your IP fabric architecture, which two statements are true? (Choose
two.)
A. Spine nodes only peer to leaf nodes.
B. Leaf nodes peer to both spine and leaf nodes.
C. Leaf nodes only peer to spine nodes.
D. Spine nodes peer to both leaf and spine nodes.
Correct Answer: AC
QUESTION 4
You are asked to manage the oversubscription ratio of your spine and leaf IP fabric. You determine that you are at a 3:1
ratio of downstream to upstream traffic and must achieve a 1:1 ratio.
In this scenario, which two actions would you take to achieve this goal? (Choose two.)
A. Increase the number of server-facing ports that each leaf node uses to carry traffic.
B. Reduce the number of server-facing ports that each leaf node uses to carry traffic.
C. Increase the number of spine nodes in your design.
D. Reduce the number of leaf nodes in your design.
Correct Answer: BC
QUESTION 5
Which statement is true about a Data Center Interconnect over an IP network?
A. Layer 2 data must traverse a point-to-point link.
B. Layer 2 data must traverse an MPLS LSP.
C. Layer 2 data must be encapsulated.
D. Layer 3 data must be encapsulated.
Correct Answer: B
QUESTION 6
What happens when a packet is encapsulated by a VXLAN before being placed in the overlay?
A. The QoS markings are placed in the VXLAN header.
B. The VLAN-ID is placed in the VXLAN header.
C. A VNI that maps to the VLAN-ID is placed in the VXLAN header.
D. The TTL is decremented by two and placed in the VXLAN header.
Correct Answer: C
QUESTION 7
Referring to the exhibit, Host 1 and Host 3 have exchanged traffic.
In this scenario, which statement is true?
A. Leaf 2 does not learn Host 1\\’s MAC address until Host 1 and Host 2 send traffic to each other.
B. Leaf 2 learns Host 1\\’s MAC address through periodic updates from Spine 2.
C. Leaf 2 learns Host 1\\’s MAC address when Host 3 learns Host 1\\’s MAC address.
D. Leaf 2 learns Host 1\\’s MAC address when Leaf 1 queries Host 1.
Correct Answer: D
QUESTION 8
Which protocol is used between VCF member devices to create a loop-free topology?
A. LLDP
B. MSTP
C. RSTP
D. VCCP
Correct Answer: D
QUESTION 9
You are deploying a VXLAN using EVPN signalling overlay network in your new data center. You are able to establish
your MP-BGP peering sessions and see your EVPN routes, but traffic will not traverse the VXLAN using EVPN
signalling overlay network.
What is a solution to this problem?
A. Increase the MTU on the logical VTEP source interface of all devices participating in VXLAN using EVPN signaling.
B. Enable the mtu-discovery feature on the MP-BGP peering sessions between all VXLANs using EVPN signalling
peers.
C. Increase the protocol MTU on all devices participating in VXLAN using EVPN signalling.
D. Increase the physical MTU on all ports on all devices participating in VXLAN using EVPN signaling.
Correct Answer: D
QUESTION 10
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. OSPF
B. BGP
C. EVPN
D. PIM
Correct Answer: C
QUESTION 11
The MC-LAG group shown in the exhibit is providing high availability services for the directly connected servers. The
backup liveness detection is applied to the ICL-PL link, however, when one of the members rebooted, there was traffic
loss for a few seconds.
In this scenario, where should you apply the backup liveness detection?
A. on the ae1 interface
B. on the ae2 interface
C. on the management interfaces
D. on the ae0 interface
Correct Answer: C
QUESTION 12
You are asked to deploy 20 QFX Series devices using ZTP. Each QFX5100 requires a specific FTP server.
In this scenario, which two components must you configure on the DHCP server? (Choose two.)
A. the IP address of the FTP server
B. the MAC address of the FTP server
C. the IP address of each QFX5100
D. the MAC address of each QFX5100
Correct Answer: AD
QUESTION 13
Which two statements define the use of route targets and route distinguishers in an EVPN? (Choose two.)
A. Route targets ensure that routes from different clients remain unique within the data center domain.
B. Route targets identify the VRF into which the route should be placed.
C. Route distinguishers ensure that routes from different clients remain unique within the data center domain.
D. Route distinguishers identify the VRF into which the route should be placed.
Correct Answer: BC
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