Juniper JN0-683 Dumps Questions Answers

https://www.juniper.net/documentation/us/en/software/nce/nce-225-bgp-unnumbered/index.html

Understanding Oversubscription in a Clos Fabric:

The oversubscription ratio in a Clos IP fabric measures the ratio of the amount of edge (leaf) bandwidth to the core (spine) bandwidth. An oversubscription ratio of 3:1 means that there is three times more edge bandwidth compared to core bandwidth.

Impact of Adding/Removing Spine Devices:

Option C:If youremove spine devices, the total available core bandwidth decreases, while the edge bandwidth remains the same. This results in anincrease in the oversubscription ratiobecause there is now less core bandwidth to handle the same amount of edge traffic.

Option B:Conversely, if youadd spine devices, the total core bandwidth increases. This decreases the oversubscription ratio because more core bandwidth is available to handle the edge traffic.

Conclusion:

Option C:Correct—Removing spine devices increases the oversubscription ratio.

Option B:Correct—Adding spine devices decreases the oversubscription ratio.

VXLAN Control Planes:

VXLAN (Virtual Extensible LAN) uses different control planes to handle MAC learning and traffic forwarding. The control planes include multicast and EVPN (Ethernet VPN).

Multicast and EVPN Comparison:

Option B:Both multicast and EVPN can be used for MAC learning in a VXLAN environment. Multicast is a more traditional approach, while EVPN is more advanced and supports distributed MAC learning.

Option D:EVPN offers benefits such as fast convergence and rapid updates, making it more efficient and scalable for modern data center environments.

Option E:Multicast does not require as many resources because it relies on traditional Layer 3 multicast mechanisms to distribute broadcast, unknown unicast, and multicast (BUM) traffic. However, it can be less flexible and less scalable compared to EVPN.

Conclusion:

Option B:Correct—Both control planes facilitate MAC learning.

Option D:Correct—EVPN provides fast convergence and updates.

Option E:Correct—Multicast is resource-efficient but less flexible.