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Server Message Block

Q: What is Server Message Block?

Server Message Block (SMB) is a Application Layer protocol in the Storage category. Network file sharing protocol providing shared access to files, printers, and serial ports. Used by Windows for file sharing (CIFS) and the basis of Samba for Linux/Unix.

Application Layer — Storage

Protocol Overview

Full Name Server Message Block

Abbreviation SMB

OSI Layer Application Layer

Category Storage

Default Port 445

About SMB

Network file sharing protocol providing shared access to files, printers, and serial ports. Used by Windows for file sharing (CIFS) and the basis of Samba for Linux/Unix.

Application Layer Storage Port 445

Related Protocols — Application Layer

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