JN0-680 Online Training Archives

If you already have a job and you are searching for the best way to improve your current JN0-680 Data Center, Professional exam, then you should consider the Juniper JN0-680 Data Center, Professional Online Training. By using Exam4Training updated Juniper JN0-680 products, you will be able to get reliable and relative JNCIP-DC JN0-680 prep questions, so you can pass the exam easily. You can get one-year free updates from the date of purchase.

Page 1 of 2

1. Which EVPN service consists of a single broadcast domain per EVPN instance?

a VLAN bundle service interface

a VLAN-based service interface

a port-based VLAN-aware service interface

a port-based service interface

2. You are implementing a Virtual Chassis using QFX5100s and EX4300s in your data center.

In this scenario, which two statements are correct? (Choose two.)

Only 10GbE VCP connections can be used between the QFX5100s and the EX4300s.

The QFX5100 devices cannot assume the line card role in the Virtual Chassis.

Some hardware capabilities are limited by the capabilities of the EX4300 switches.

The EX4300 devices can only assume a line card role in the Virtual Chassis.

3. A customer notices that all traffic is traveling over a single link within their partially meshed IP Fabric using IBGP. While troubleshooting, the customer notices that the configuration is missing a configuration parameter.

Which parameter would the customer use to solve this problem?

accept-remote-nexthop

advertise-peer-as

add-path

multihop

A customer has a 3-stage Clos architecture with three spine devices as shown in the exhibit.

If a single spine device fails, what percentage of the remaining bandwidth will be available from leaf node to leaf node?

approximately 25%

approximately 75%

approximately 33%

approximately 66%

Referring to the exhibit, which hardware change would be made to the IP Fabric to ensure an exact 4:1 oversubscription ratio?

Upgrade the fabric links to 100Gb

Add two leaf nodes to the IP Fabric.

Add three leaf nodes to the IP Fabric.

Add a spine node to the IP Fabric.

6. 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?

There is an LACP key mismatch.

The MTU is exceeded.

The routing protocol authentication has failed.

The BPDU protection is invoked.

7. 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.)

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

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

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

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

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

LLDP

MSTP

RSTP

VCCP

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.)

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

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

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

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

10. 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?

Reboot all of the VCF members.

Power off all of the VCF members and power up the spines before powering up the leafs.

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.

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.

Page 2 of 2

11. Your server administrator asks you to preserve the inner VLAN tags of the frames coming from a Layer 2 VXLAN Gateway of the EVPN-enabled segment.

Which two parameters must you add to the configuration to allow the VLAN tag to be passed? (Choose two.)

layer2-protocol-tunneling

decapsulate-accept-inner-vlan

dotlq-tunneling

encapsulate-inner-vlan

12. Which two statements are correct when performing a unified ISSU? (Choose two.)

The master Routing Engine and backup Routing Engine must be running the same software version before you can perform a unified ISS

Unicast RPF-related statistics are not saved across a unified ISSU, and the unicast RPF counters are reset to zero during a unified ISS

Unicast RPF-related statistics are saved across a unified ISSU, and the unicast RPF counters are not reset to zero during a unified ISS

The backup Routing Engine must be running the most recent software version before you can perform a unified ISS

13.

Referring to the exhibit, PE1 and PE2 are acting as MPLS Layer 3 VPN PEs to provide the DCI between DC1 and DC2, which are IP Fabrics. Leaf 1 and Leaf 2 are QFX5100 Series devices acting as VXLAN Layer 2 Gateways using EVPN signaling for the same VXLAN segment.

Which statement is correct about the Edge1 device in this scenario?

Edge1 must be configured for MP-BGP using EVPN signaling.

Edge1 must be configured for MP-BGP using L3VPN signaling.

Edge1 must be configured for BGP labeled unicast on its PE1-facing interface.

Edge1’s routing table must contain an IP route to both Leaf1 and Leaf2.

14.

You are deploying a VXLAN using EVPN signaling overlay network. PE1 and PE2 are multihomed to the connected CE device. You notice that the traffic is not load-balancing as expected.

Referring to the exhibit, which two actions will solve this problem? (Choose two.)

Set the route distinguisher on PE2 to 11.11.11.11:100.

Set the LACP system ID on PE2 to 00:00:00:00:00:01.

Set the ESI on both devices to 00:00:00:00:00:00:00:00:00:00.

Set the ESI on PE2 to 00:11:11:11:11:11:11:11:11:11.

15. In a preprovisioned mixed Virtual Chassis, which statement is correct about converting a 40Gbps QSFP+ to a Virtual Chassis port in an EX4300?

LLDP is enabled on that interface.

LLDP is disabled on that interface.

One end of the link is configured as a Virtual Chassis port.

Both ends of the link have the default configuration.

16. You are implementing a Virtual Chassis using QFX5100s and EX4300s in your data center.

In this scenario. which three hardware capabilities are affected? (Choose three.)

usable VCP connections limited to 10GbE

MAC table size

number of usable ports per member

number of supported routing instances

maximum number of firewall filters

17. You are developing an EVPN service between your data centers to enable Layer 2 stretch and Virtual Machine Traffic Optimization (VMTO) operations.

In this scenario, which action must be performed on the IRB interface to accomplish this task?

Configure the same IP address and let the MAC address be dynamically assigned on each P

Configure the same IP address and the same MAC address on each P

Configure different IP addresses but the same MAC address on each P

Configure different IP addresses and different MAC addresses on each P