Switch-1 in the exhibit receives a packet from User A with a destination MAC address of 00:26:88:02:74:47. Which statement is correct in this scenario?
 

A. Switch-1 floods the packet out ge-0/0/6, ge-0/0/7, ge-0/0/8, and ge-0/0/9.

B. Switch-1 floods the packet out ge-0/0/7 and ge-0/0/8.

C. Switch-1 floods the packet out ge-0/0/7, ge-0/0/8, and ge-0/0/9.

D. Switch-1 sends the packet out ge-0/0/7 only.








 

Suggested Answer: C



To forward a frame destined to that specific mac -address, it will know out of which port to send the frame. Flooding however occurs when the switch does not know of the destination mac - address? say the switch has not learnt that mac address yet; or maybe that specific entry expired so it got flushed away from the mac-address table. To ensure the frame reaches its intended destination, the switch will replicate that frame out of all ports, less the port where the frame was received that's flooding.
Reference:
http://blogbt.net/index.php/2015/03/mac-address-table-arp-table-and-unicast-flooding-part-i/

This question is in JN0-347 Juniper Networks Certified Specialist (JNCIS-ENT) Exam
For getting Juniper Networks Certified Specialist - Enterprise Routing and Switching (JNCIS-ENT) Certificate








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