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Difficulty: EasyRemote Access Technologies and Tools

A network technician needs to configure perimeter firewall rules to support secure remote administration of corporate servers. The requirements state that administrators must have access for encrypted command-line management as well as full graphical desktop administration. Which TWO standard port numbers must the technician allow through the firewall? (Select TWO.)

  1. TCP 22Answer
  2. TCP 3389Answer
  3. C
    TCP 23
  4. D
    TCP 80

Answer

The correct ports to allow are TCP 22 (for SSH encrypted command-line access) and TCP 3389 (for RDP remote graphical desktop management).
TCP port 22 provides Secure Shell (SSH) access for encrypted command-line administration. TCP port 3389 provides Remote Desktop Protocol (RDP) access for full graphical desktop management.

Step-by-Step Solution

1
Identify the requirement for secure, encrypted command-line management.
Secure Shell (SSH) satisfies secure CLI administration and operates on default port TCP 22.
SSH encrypts session communications, making it preferred over unencrypted protocols.
2
Identify the requirement for full graphical desktop remote administration.
Remote Desktop Protocol (RDP) provides full graphical session management and operates on default port TCP 3389.
RDP is the standard Microsoft protocol for managing remote Windows desktop sessions over a network.
3
Evaluate and eliminate incorrect ports.
TCP 23 (Telnet) is insecure/unencrypted, and TCP 80 (HTTP) is used for standard web browsing rather than remote OS management.
Firewall rules should strictly enable the protocols matching the security and functional requirements.

Key Concept

Standard default port numbers for remote administration protocols (SSH over TCP 22 and RDP over TCP 3389).
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Remote Access Technologies and Tools

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