Ports 137 and 139 are associated with NetBIOS/NetBT services. Port 137 is used by NetBIOS for name resolution services, allowing machines on a local network to find each other by name, whereas port 139 is used for session services, facilitating communication between computers. Even though port 135 is also used for RPC Endpoint Mapper, it's not directly related to NetBIOS/NetBT services, and 445 is reserved for Microsoft-DS (Directory Services) over SMB, which facilitates file sharing without the NetBIOS layer.
Ask Bash
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
What is NetBIOS, and why is it important for networking?
Open an interactive chat with Bash
Why are ports 137 and 139 specifically used for NetBIOS functions?
Open an interactive chat with Bash
How do ports 139 and 445 differ in use for file sharing?