Simple definition
The protocol used mainly by Windows for file and printer sharing.
Technical definition
Server Message Block provides access to files, shares,,,,, and certain authentication functions on a network, usually via TCP 445.
What is it used for ?
Share folders, access to a NAS or provide domain resources.
Practical example
The common \server path usually uses SMB to access the common sharing.
Common issues
- Port 445 filtered
- Versions SMB incompatible
- Incorrect authentication or permissions
Related terms
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.