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How does a switch handle VLAN tagging?

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Question: How does a switch handle VLAN tagging?

Options:

  1. By using MAC addresses
  2. By using IP addresses
  3. By using 802.1Q tags
  4. By using ARP requests

Correct Answer: By using 802.1Q tags

Solution: 

Switches use 802.1Q tags to identify VLANs, allowing them to properly forward frames to the correct VLAN.

How does a switch handle VLAN tagging?

Practice Questions

Q1
How does a switch handle VLAN tagging?
  1. By using MAC addresses
  2. By using IP addresses
  3. By using 802.1Q tags
  4. By using ARP requests

Questions & Step-by-Step Solutions

How does a switch handle VLAN tagging?
  • Step 1: Understand that a VLAN (Virtual Local Area Network) is a way to create separate networks within the same physical switch.
  • Step 2: Know that VLAN tagging is a method used to identify which VLAN a data frame belongs to.
  • Step 3: Learn about the 802.1Q standard, which is the most common method for tagging VLANs in Ethernet frames.
  • Step 4: When a switch receives a frame, it checks for the 802.1Q tag to see which VLAN the frame is associated with.
  • Step 5: The switch then uses this information to forward the frame only to the ports that are part of the same VLAN.
  • Step 6: If the frame does not have a VLAN tag, the switch may treat it as belonging to a default VLAN.
  • VLAN Tagging – Switches use 802.1Q tags to identify and manage VLANs, ensuring that network traffic is directed to the appropriate VLAN.
  • Frame Forwarding – Understanding how switches forward frames based on VLAN tags is crucial for network segmentation and traffic management.
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