Updated: July 16, 2020 (May 15, 2017)
Charts & IllustrationsSMB Version Negotiated Between Systems
Clients running Windows will automatically settle on the lowest common version of SMB when two devices negotiate. This practice can cause a device that supports a more recent version of SMB to drop back to SMB 1 when communicating with legacy systems or devices, unless SMB 1 protocol support has been disabled or removed.
| OS | Windows 10 WS 2016 |
Windows 8.1 WS 2012 R2 |
Windows 8 WS 2012 |
Windows 7 WS 2008 R2 |
Windows Vista WS 2008 |
Previous Versions |
| Windows 10
WS 2016 |
SMB 3.1.1 | SMB 3.02 | SMB 3.0 | SMB 2.1 | SMB 2.0 | SMB 1.0 |
| Windows 8.1
WS 2012 R2 |
SMB 3.02 | SMB 3.02 | SMB 3.0 | SMB 2.1 | SMB 2.0 | SMB 1.0 |
| Windows 8
WS 2012 |
SMB 3.0 | SMB 3.0 | SMB 3.0 | SMB 2.1 | SMB 2.0 | SMB 1.0 |
| Windows 7
WS 2008 R2 |
SMB 2.1 | SMB 2.1 | SMB 2.1 | SMB 2.1 | SMB 2.0 | SMB 1.0 |
| Windows Vista
WS 2008 |
SMB 2.0 | SMB 2.0 | SMB 2.0 | SMB 2.0 |
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