Download PassLeader New Juniper JN0-680 Exam Dumps for Free in VCE and PDF (Question 16 – Question 20)

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The exhibit shows an output from a QFX5100 Series switch serving as an MC-LAG peer.
Which two statements are true in this scenario? (Choose two.)

A.    ae0.0 is functioning as an ICL.
B.    et-0/0/51.0 is a standalone link and not part of an MC-AE bundle.
C.    et-0/0/51.0 is a member link of qfx5100-1 within an MC-AE bundle.
D.    ae1.0 is functioning as an ICL.

Answer: AB

You are having management connectivity problems with a mixed-mode Virtual Chassis. Which statement is correct in this scenario?

A.    The master RE’s me0 MAC address should match the MAC address of the vme.
B.    Each member’s me0 MAC address should match the MAC address on the vme.
C.    Each member’s me0 MAC address should not match the MAC address of the vme.
D.    The current me0 MAC address should match the MAC address of the vme.

Answer: A

Referring to the exhibit, what is the MAC address of the IRB interface on router PE1?

B.    a8:d0:e5:54:0d:10
C.    1:100::0::100::a

Answer: B

You are establishing an IP Fabric where your QFX10002-72Q spine devices are connecting to leaf devices. Each leaf is a Virtual Chassis comprised of ten EX4300s. What is the maximum number of leaf devices supported in this scenario?

A.    36
B.    18
C.    16
D.    10

Answer: D
“up to 128 satellite devices” — where each EX4300 VC = 10 devices; 128/10 = 12 max, closest answer is D: 10.

You are deploying an IP Fabric in your new data center. You need to ensure that your servers have multiple active/active links for redundancy and load balancing. What are two methods to accomplish this goal? (Choose two.)

A.    Use EVPN with ESI at the access switch.
B.    Use MSTP to enable multiple links on the access switch.
C.    Use MC-LAG at the access switch.
D.    Use PIM-SM to enable multicast across multiple links.

Answer: BC
NOT A: because EVPN is specifically designed to handle multi-homed access redundancy, and mobility, and load-balancing is possible. I would not choose this though because EVPN is primarily a DCI protocol for interconnecting datacenters and is not typically considered an access layer protocol facing the servers. It is possible to use EVPN inside a single datacenter, in which case it would be used between the access switches and the distribution/core switches. In the spirit of the question however, this does not face the servers directly so I exclude it.
B: because MSTP allows for multiple spanning trees, which allows for use of all inter-switch links by, for example, aggregating VLANs into spanning trees, eg: VLANs 1-100 in one tree, 101-200 in another. One spanning tree is active on a given link, the other is inactive. In this way load-balancing is achieved. In case of link failure, all traffic will fall to the remaining link(s).
C: because MC-LAG allows for link aggregation across multiple chasses -> permits load-balancing and provides redundancy.
NOT D: because PIM-SM is a control-plane signaling protocol for multicast which enables routers to join and prune their membership to given multicast distribution trees. It has little directly to do with the redundancy and load-balancing of (multicast) traffic receivers.

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