About Application Protocols, Authenticated Connections, and Domain Controllers : Viewing SMB connections
  
Viewing SMB connections
SMB connections appear in the Current Connections report with these labels:
SMB 2.0 and SMB 2.0.2 connections show as SMB20 or SMB21-SIGNED.
SMB 2.1 connections show as SMB21 or SMB21-SIGNED.
SMB 3.0 and SMB 3.0.2 connections show as SMB30 if there are protocol errors, or SMB30-ENCRYPTED or SMB30-SIGNED.
SMB 3.1.1 connections show as SMB31 if there are protocol errors, or SMB31-ENCRYPTED or SMB31-SIGNED.
When some shares are marked for encryption and others aren’t, if a connection accesses both encrypted and nonencrypted shares, the report shows the connection as SMB30-ENCRYPTED or SMB31-ENCRYPTED.
All unsupported SMB dialects show as SMB-UNSUPPORTED.
About SMB2 and SMB3
Viewing the Current Connection report