What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?
What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?
When a Layer 2 switch receives a frame with an unknown destination MAC address, it floods the frame to all other ports within the same VLAN except for the port on which the frame was received. This behavior ensures that the frame reaches its intended recipient, allowing the recipient to respond and the switch to learn the new MAC address for future reference.
Sometimes called BUM traffic - Broadcast, Unknown Unicast, Multicast. These forms of traffic are "flooded" out all ports except the port the packet was received on.
C is correct. Whenever a switch receive a frame, it look f MAC address table for a matching entry and if not found ,switch will forward to (Flood) all the ports in the switch except the port that received.
I wrote the CCNA exam yesterday, and i passed. this site was really helpful and again reading through comment did help as well.
Ref: Introduction to Networks Companion Guide (CCNAv7) “Chapter 7 Ethernet Switching … The MAC Address Table … Find the Destination MAC Address If the destination MAC address is a unicast address, the switch looks for a match between the destination MAC address of the frame and an entry in its MAC address table. If the destination MAC address is in the table, the switch forwards the frame out the specified port. If the destination MAC address is not in the table, the switch forwards the frame out all ports except the incoming port. This is called an unknown unicast. …”
Helpful share, thanks
I would also like to add that if the source MAC address is not in the CAM table, then it will be added.
Switches Flood traffic with unknown destination MAC Address out all ports apart from the one it received, They do not forward. They will only forward if the destination MAC Address is in the CAM Table. So from the question the keyword is "UNKNOWN MAC ADDRESS" and Letter C has the Keyword "FLOOD" thus C is the correct answer
I believe its C But shouldnt it say flood 'frames' not packets
Answer is C. The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN. When a Layer 2 switch receives a frame with an unknown destination MAC address, it will flood the frame to all ports in the same VLAN, except for the port from which the frame was received. This is done so that the destination device can receive the frame and respond with its MAC address.
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Selected Answer C, unknown destination address, switch flood the frame to its all ports except the received one in the same VLAN.
C is corect, it can cause flooding
C, flood all port, except port was received
C is definitely wrong............... if you are not studying well.
Correct
C is correct
C is correct and there is STP that helps to send the packets in designated ports to avoid collusions in the vlan.
C is the correct option Contact me for full questions <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="224f4356564b564b51624d57564e4d4d490c414d4f">[email protected]</a>