What is a VLAN, its advantages and Disadvantages | Top Interview Question for CCNA and Networking

What is VLAN? These are Real Interview Questions that I usually ask when I interview for a DevOps and Cloud Architect position and Systems Engineer Role. VLAN Explained, its advantages and Disadvantages, can be asked for Cloud Engineer interview, Application design Engineer interview, Front End developer/Engineer interview and Backend developer/Engineer and Full stack developer position.
This is a basic IT concept that you should know if you want to transition to an IT career.
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