Exam: 200-301: Cisco Certified Network Associate (CCNA) 0 Likes
What is the default behavior of a Layer 2 switch when a frame with an (CCNA 200-301)
What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?
A) The Layer 2 switch forwards the packet and adds the destination MAC address to its MAC address table.
B) The Layer 2 switch sends a copy of a packet to CPU for destination MAC address learning.
C) The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN.
D) The Layer 2 switch drops the received frame.
Solution
Correct answer: C) The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN.
The default behavior of a Layer 2 switch when it receives a frame with an unknown destination MAC address is to flood the frame to all ports in the same VLAN, except the port on which the frame was received. This is done to discover the location of the destination device and to ensure that the frame reaches its intended destination. As devices respond to the flooded frame, the switch learns the association between MAC addresses and port numbers and updates its MAC address table.
Category: Network Access