312-50V10 · Question #631
Sandra has been actively scanning the client network on which she is doing a vulnerability assessment test. While conducting a port scan she notices open ports in the range of 135 to 139. What protoco
The correct answer is D. SMB. Ports 135-139 are well-known Windows networking ports associated with the SMB (Server Message Block) protocol used for file and printer sharing.
Question
Sandra has been actively scanning the client network on which she is doing a vulnerability assessment test. While conducting a port scan she notices open ports in the range of 135 to 139. What protocol is most likely to be listening on those ports?
Options
- AFinger
- BFTP
- CSamba
- DSMB
How the community answered
(43 responses)- A2% (1)
- B5% (2)
- C2% (1)
- D91% (39)
Why each option
Ports 135-139 are well-known Windows networking ports associated with the SMB (Server Message Block) protocol used for file and printer sharing.
Finger uses port 79 and is used to retrieve user information on Unix systems, not associated with ports 135-139.
FTP uses ports 20 (data) and 21 (control), which are entirely outside the 135-139 range.
Samba is the open-source Linux/Unix implementation of the SMB protocol; Samba is the software, not the protocol name, and SMB is the correct answer for the protocol listening on these ports.
SMB (Server Message Block) operates over NetBIOS using ports 135 (RPC endpoint mapper), 137 (NetBIOS name service), 138 (NetBIOS datagram), and 139 (NetBIOS session), making it the protocol most likely listening across that range. SMB is the primary Windows protocol for file sharing, printer access, and inter-process communication.
Concept tested: SMB protocol port identification (135-139)
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/service-overview-and-network-port-requirements
Topics
Community Discussion
No community discussion yet for this question.