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Data Centers: 66 (JN0-680) - Juniper Exam Questions

Last updated on June 20, 2026

97% Exam Compliance
66 Total Questions
1
Question
Exhibit

Referring to the exhibit, what is the MAC address of the IRB interface on router PE1?
Options
A a8:d0:e5:54:0d:10
B 2.91.223.216:100
C 2.10.255.0.1:100
D 1:100::0::100::a
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2
Question
Exhibit

Referring to the exhibit, each leaf node is a QFX5100 acting as a VXLAN Layer 2 Gateway using EVPN signaling. Leaf 2 and Leaf 3 are both attached to the same EVPN Ethernet segment. Leaf 2 has been elected the designated forwarder for VLAN 200 on that Ethernet segment. In this scenario, which two actions will Leaf 1 perform with the broadcast Ethernet frame received
from Host A? (Choose two.)
Select 2
Options
A Leaf 1 will send a VXLAN encapsulated copy of the Ethernet frame to both Leaf 2 and Leaf 3.
B Leaf 1 will strip the VLAN tag from the Ethernet frame before encapsulating it in VXLAN.
C Leaf 1 will send a VXLAN encapsulated copy of the Ethernet frame to Leaf 2 only.
D Leaf 1 will change the VLAN tag of the Ethernet frame to 200 before encapsulating it in VXLAN.
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3
Question
You are building an EVPN Data Center Interconnect. You must support multiple VLANs in a single EVPN instance.

Which parameter provides this functionality?
Options
A instance-type evpn
B instance-type no-forwarding
C instance-type 12vpn
D instance-type virtual-switch
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4
Question
Exhibit

The MC-LAG group shown in the exhibit is providing high availability services for the directly connected servers.
Where does Juniper Networks recommend you provide the backup liveness detection?
Options
A on the ae2 interface
B on the ICL-PL connection
C on the management interfaces
D on the ae1 interface
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5
Question
You have built a mixed-mode VCF consisting of two QFX5100-24Qs as spines, two QFX5100-48S as leaf nodes, and one EX4300 as a leaf node. The VCF is working for all devices, except the EX4300 40GbE fabric links will not join the VCF. In this scenario, what must be corrected to solve the connectivity problem?
Options
A Reboot all of the VCF members.
B Power off all of the VCF members and power up the spines before powering up the leafs.
C Turn off authonegotiation on the EX4300 and the attached spine interfaces, and then use the request virtual-chassis vc-port set command on the spine ports connected to the EX4300.
D Zeroize the EX4300, cleat all the tables with the clear ethernet-switching tables command on all members, and reissue the request virtual-chassis mixed-mode command.
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