Question

Difficulty: MediumRemote Access Technologies and Tools

Which operational specification or edition constraint correctly corresponds to each remote access technology listed on the left?

  • RDP (Remote Desktop Protocol)Uses TCP port 3389 and requires Windows Pro, Enterprise, or Education editions to host incoming connections.
  • SSH (Secure Shell)Uses TCP port 22 to provide encrypted command-line management for remote devices and Linux servers.
  • MSRA (Microsoft Remote Assistance)Uses invitation files or passkeys to allow a support technician to view and share control of an active user session.
  • TelnetUses TCP port 23 to transmit unencrypted text commands and credentials across the network.

Answer

Remote Desktop Protocol (RDP) pairs with TCP port 3389 and Windows Pro/Enterprise hosting requirements. Secure Shell (SSH) pairs with TCP port 22 for encrypted CLI access. Microsoft Remote Assistance (MSRA) pairs with invitation-based session screen sharing. Telnet pairs with unencrypted plain text traffic over TCP port 23.
Each remote access tool matches its standard CompTIA A+ specification: Remote Desktop Protocol uses TCP port 3389 and requires Windows Pro or higher to host sessions; Secure Shell uses TCP port 22 for encrypted CLI management; Microsoft Remote Assistance uses invitation-based screen sharing for collaborative user support; Telnet uses TCP port 23 and transmits data in unencrypted cleartext.

Step-by-Step Solution

1
Determine the network port and Windows edition requirement for Remote Desktop Protocol.
RDP listens on TCP port 3389 and can only host incoming connections on Windows Pro, Enterprise, or Education editions.
Windows Home edition lacks the inbound RDP host feature, though it can initiate connections to external RDP servers.
2
Identify the secure encrypted command-line remote access protocol.
SSH operates over TCP port 22 and encrypts all session data and credentials.
SSH is the standard replacement for legacy unencrypted terminal protocols when managing network equipment and remote servers.
3
Identify the tool designed for collaborative session assistance.
MSRA relies on session invitations to allow simultaneous viewing and shared control of a logged-in user's desktop.
MSRA allows the end user and technician to interact on the same desktop session, unlike RDP which locks the local desktop when a new session starts.
4
Identify the legacy unencrypted terminal protocol.
Telnet uses TCP port 23 and transmits data in unencrypted plain text.
Because Telnet does not encrypt passwords or commands, packet sniffers can intercept sensitive management traffic.

Key Concept

Remote Access Technologies and Specifications
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