Question

Difficulty: EasyCommon Ports and Protocols

A system engineer is configuring a network firewall rule to allow remote desktop management connections to a centralized Windows server host. Which of the following port and transport protocol combinations must be permitted through the firewall?

  1. TCP port 3389Answer
  2. B
    UDP port 3389
  3. C
    TCP port 22
  4. D
    TCP port 23

Answer

TCP port 3389 is the default transport protocol and port used by Remote Desktop Protocol (RDP).
Remote Desktop Protocol (RDP) utilizes TCP port 3389 by default to establish connection-oriented graphical administration sessions to Windows systems.

Step-by-Step Solution

1
Identify the target network service required by the scenario
The scenario requires permitting Remote Desktop Protocol (RDP) traffic.
Firewall rules must correspond to the specific protocol and port assigned to remote desktop management.
2
Identify the default port number and transport layer protocol for RDP
RDP uses TCP port 3389 by default.
Standard network specifications assign TCP port 3389 for reliable graphical remote management.

Key Concept

Common Ports and Protocols - Remote Desktop Protocol (RDP)
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