220-1102 Practice Question: A technician is unable to establish a Remote…

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

Answer analysis

Why the other options are wrong

Understanding why incorrect options are tempting is as important as knowing the correct answer.

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  Remote Desktop is set to allow connections only from computers with Network Level Authentication

  NLA is a security feature but does not block the connection if the client supports it; it would prompt for credentials rather than fail the entire connection.

• ✗

  The Remote Desktop Service is set to Manual startup

  Even if set to Manual, the service starts when a connection request is made. This would not block the connection unless the service is disabled entirely.

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  The target workstation is using a dynamic IP address

  Dynamic IP addresses do not prevent RDP as long as the IP is reachable. DNS or hostname resolution might be affected, but the direct cause is typically a firewall block.

Technical deep dive

How to think about this question

The core concept tested here is the role of a firewall in network communication, specifically for a common service like Remote Desktop Protocol (RDP). For any network service to function, not only must the service itself be running and configured, but the operating system's firewall must also explicitly permit inbound traffic on the service's designated port. RDP utilizes TCP port 3389 by default. When a Remote Desktop Connection is attempted, the client sends a connection request to the target workstation's IP address on port 3389. If the firewall on the target workstation does not have an inbound rule allowing this traffic, it will drop the packets, effectively preventing the connection from ever being established, regardless of other RDP settings. The question explicitly states the firewall is enabled on both systems, which immediately directs attention to its configuration as the most probable point of failure for a blocked connection. This scenario highlights the fundamental principle that firewalls act as a gatekeeper, and without an explicit 'allow' rule, traffic is implicitly denied. While Network Level Authentication (NLA) is a security feature that authenticates the user before establishing a full RDP session, it wouldn't prevent the initial connection attempt from reaching the RDP service; rather, it would present an authentication challenge. Similarly, the Remote Desktop Service being set to Manual startup is not a blocker because the service is designed to start on demand when an RDP connection request is received. A dynamic IP address, while potentially inconvenient for consistent access without DNS, does not inherently prevent a connection if the correct, current IP is used. Therefore, the firewall's lack of an inbound rule is the most direct and common reason for a complete connection failure in this context.

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