IT 4100 : File Systems and Storage Technologies

Server message block: a protocol that allows applications on a computer to read and write to files and to request services from server programs in a computer network. (Client/server model)
Application layer protocol (usually on top of TCP/IP)
- Originally used port 139, not uses 445

SMBv1 was released in 1984 by IBM for file sharing in DOS. Microsoft modified and updated it in 1990.
CIFS was released in 1996 with more features and support for larger file sizes. It came together with the new Windows 95.
SMBv2 debuted in Windows Vista in 2006. It featured a notable boost in performance because of increased efficiency — fewer commands and subcommands meant better speeds.

SMBv2.1 came with Windows 7, bringing improved performance.
SMBv3 was introduced with Windows 8 with many updates. Most notable of which is enhanced security — the protocol started supporting end-to-end encryption.
SMBv3.02 came together with Windows 8.1. It offered the ability to increase security and performance by completely disabling SMBv1.
SMBv3.1.1 was released in 2015 with Windows 10. It added more security elements to the protocol, like AES-128 encryption, protection from man-in-the-middle attacks, and session verification.

Has some severe security considerations: