NETBIOS is a Microsoft legacy naming convention that has a flat namespace of a maximum of 15 characters with a service identifier. Each computer name has three separate entries in its database, called WINS and it uses a flat file, called the LMHosts file.

The entry for PC1 as a WINS database would be:

  • PC1 <00>: The <00> represents the workstation service
  • PC2 <03>: The <03> represents the messenger service
  • PC3 <20>: The <20> represents the server service

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