220-1101 · Question #355
A network administrator is troubleshooting a connectivity issue. The administrator performs a port scan, and the following information is generated: Which of the following standard ports should be ope
The correct answer is D. 3389. To establish a successful Remote Desktop Protocol (RDP) connection, the standard port 3389 must be open.
Question
A network administrator is troubleshooting a connectivity issue. The administrator performs a port scan, and the following information is generated:
Which of the following standard ports should be open to allow a successful RDP connection?
Exhibit
Options
- A53
- B443
- C445
- D3389
How the community answered
(36 responses)- A3% (1)
- B6% (2)
- D92% (33)
Why each option
To establish a successful Remote Desktop Protocol (RDP) connection, the standard port 3389 must be open.
Port 53 is used for DNS (Domain Name System), which resolves domain names to IP addresses, not for RDP connections.
Port 443 is the standard port for HTTPS (HTTP Secure) traffic, used for secure web browsing.
Port 445 is used for SMB (Server Message Block) over TCP, primarily for file sharing and printer sharing in Windows networks.
RDP connections, which allow remote access to a desktop, utilize TCP port 3389 by default to establish communication between the client and the server. This port needs to be open on firewalls and accessible on the target machine for the connection to succeed.
Concept tested: Standard RDP port number
Source: https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/rdp-ports
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