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Zorluk: OrtaNetworking Ports and Protocols

A network technician is setting up a dedicated boot server to push minimal firmware images to network switches during zero-touch deployment. The switches use a lightweight, unauthenticated file transfer protocol that does not require directory browsing or session management. Which of the following port and protocol combinations must be permitted through the firewall for these transfers to succeed?

  1. UDP port 69Cevap
  2. B
    TCP port 21
  3. C
    TCP port 22
  4. D
    UDP port 67

Cevap

UDP port 69 is required for Trivial File Transfer Protocol (TFTP) operations.
Trivial File Transfer Protocol (TFTP) uses UDP port 69 to deliver small files, such as system firmware and bootstrap configuration images, without needing user authentication or persistent session state.

Adım Adım Çözüm

1
Identify the protocol requirements from the scenario.
The scenario describes a lightweight, unauthenticated protocol used specifically for transferring bootstrap files and firmware images.
Lightweight network device provisioning and booting typically rely on Trivial File Transfer Protocol (TFTP).
2
Map the identified protocol to its default transport layer port.
TFTP operates over UDP port 69.
TFTP uses UDP to eliminate connection overhead for basic, small-payload file transfers.

Anahtar Kavram

TFTP operates over UDP port 69 for basic, connectionless file transfers such as bootstrapping and firmware deployment.
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Networking Ports and Protocols

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