{"id":4852,"date":"2025-06-18T08:27:41","date_gmt":"2025-06-18T08:27:41","guid":{"rendered":"https:\/\/www.itarian.com\/blog\/?p=4852"},"modified":"2025-06-18T08:27:41","modified_gmt":"2025-06-18T08:27:41","slug":"what-is-smb","status":"publish","type":"post","link":"https:\/\/www.itarian.com\/blog\/what-is-smb\/","title":{"rendered":"What is SMB? Understanding the Server Message Block Protocol"},"content":{"rendered":"

Did you know that <\/span>some of the biggest cybersecurity breaches<\/b> exploited a protocol that\u2019s been around since the 1980s? If you\u2019re in IT or cybersecurity, understanding <\/span>what SMB is<\/b> could be the key to securing your internal networks. Short for <\/span>Server Message Block<\/b>, SMB is a critical protocol that enables file and printer sharing between systems in a network. Despite its utility, it\u2019s often a target for cyberattacks due to its vulnerabilities.<\/span><\/p>\n

In this guide, we\u2019ll unpack <\/span>what SMB is<\/b>, how it works, its common uses, <\/span>SMB port numbers<\/b>, <\/span>SMB vulnerabilities<\/b>, and compare <\/span>SMB vs NFS<\/b>\u2014all to help you make better, safer infrastructure decisions.<\/span><\/p>\n

What is SMB? (Server Message Block Protocol)<\/b><\/h2>\n

Server Message Block (SMB)<\/b> is a <\/span>network file sharing protocol<\/b> that allows applications and users on a computer to read, write, and request services from devices and servers on a network.<\/span><\/p>\n

Originally developed by IBM in the 1980s, SMB was adopted and extended by Microsoft. Today, it\u2019s most commonly associated with Windows-based systems but has been implemented in various platforms including macOS, Linux, and Unix.<\/span><\/p>\n

\"What<\/p>\n

Key Functions of SMB:<\/b><\/h3>\n