Juniper JN0-680 Exam Practice Questions and Answers

Question 6 of 64

A customer has built a VXLAN using an EVPN signaling infrastructure with remote facilities with VXLAN using EVPN signaling connected to the Internet. The customer notices that the network is completely stable with no protocol errors in the underlay or overlay. The customer, however, cannot pass any application data across the network.

Which statement would explain the intermittent loss?

A.

There is an LACP key mismatch.

B.

The MTU is exceeded.

C.

The routing protocol authentication has failed.

D.

The BPDU protection is invoked.

Question 7 of 64

You have deployed a multicast server attached to a QFX5100 Series device serving as a VTEP.

Which two statements are correct in this scenario? (Choose two.)

A.

By default, the QFX5100 will send copies of the multicast packets to all locally attached devices in the same VLAN.

B.

By default, the QFX5100 will send copies of the multicast packets to locally attached devices in the same VLAN that are interested receivers only.

C.

By default, the QFX5100 will encapsulate the multicast packets in VXLAN and forward them to all remotely connected VTEPs.

D.

By default, the QFX5100 will encapsulate the multicast packets in VXLAN and forward them to remotely connected VTEPs with interested receives only.

Question 8 of 64

Which protocol is used between VCF member devices to create a loop-free topology?

A.

LLDP

B.

MSTP

C.

RSTP

D.

VCCP

Question 9 of 64

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.)

A.

Leaf 1 will strip the VLAN tag from the Ethernet frame before encapsulating it in VXLAN.

B.

Leaf 1 will send a VXLAN encapsulated copy of the Ethernet frame to both Leaf 2 and Leaf 3.

C.

Leaf 1 will change the VLAN tag of the Ethernet frame to 200 before encapsulating it in VXLAN.

D.

Leaf 1 will send a VXLAN encapsulated copy of the Ethernet frame to Leaf 2 only.

Question 10 of 64

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?

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.

Zeroize the EX4300, cleat all the tables with the clear ethernet-switching tables command on all members, and reissue the request virtual- command. chassis mixed-mode

D.

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.