Port 135 and Port 445 are crucial network ports utilized in Windows-based environments, primarily associated with file and printer sharing and facilitating communication between devices. Port 135: Historically linked with Remote Procedure Call (RPC) services, Port 135 handles requests from client applications on various computers to execute operations on a remote server. Port 445: Specifically designated for the Server Message Block (SMB) protocol, Port 445 is essential for file sharing and accessing shared resources across networks in Windows environments.