SMB 2.0 is a network file sharing protocol introduced by Microsoft in 2006 as part of the Windows Vista operating system. It enhances the earlier version, SMB 1.0, by improving performance, security, and reliability. Key features include reduced overhead, support for larger file sizes, and better handling of network interruptions. This version of the protocol allows multiple simultaneous connections, enabling faster data transfer and more efficient use of network resources. Additionally, SMB 2.0 supports features like symbolic links and improved caching, making it a more robust choice for businesses and users who rely on networked file sharing.