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Difficulty: Very hardNetworking Ports and Protocols

Match each network service or protocol scenario on the left with its corresponding default port number and transport layer protocol on the right.

  • File sharing across legacy macOS clients utilizing the Apple Filing Protocol (AFP)TCP Port 548
  • Automated retrieval of router firmware images over a local network using Trivial File Transfer Protocol (TFTP)UDP Port 69
  • Remote graphical user interface management of a Windows Server using Remote Desktop Protocol (RDP)TCP Port 3389
  • Automated assignment of IP address configurations to client hosts using Dynamic Host Configuration Protocol (DHCP)UDP Ports 67 and 68

Answer

AFP maps to TCP Port 548; TFTP maps to UDP Port 69; RDP maps to TCP Port 3389; DHCP maps to UDP Ports 67 and 68.
Each protocol is accurately matched with its standard IANA default port assignment and transport layer behavior: AFP utilizes TCP 548 for file sharing, TFTP utilizes connectionless UDP 69 for basic image transfers, RDP utilizes TCP 3389 for Windows remote desktop sessions, and DHCP utilizes UDP 67 (server) and 68 (client) for dynamic IP address provisioning.

Step-by-Step Solution

1
Identify the port and transport protocol for Apple Filing Protocol (AFP).
AFP uses TCP port 548 for macOS file sharing.
AFP requires reliable TCP communication on port 548 to mount and manage remote file shares.
2
Identify the port and transport protocol for Trivial File Transfer Protocol (TFTP).
TFTP uses UDP port 69.
TFTP is a connectionless, minimal file transfer mechanism designed to transfer small files like boot images without TCP overhead.
3
Identify the port and transport protocol for Remote Desktop Protocol (RDP).
RDP uses TCP port 3389.
RDP relies on TCP port 3389 to establish persistent, encrypted graphical management sessions for Windows endpoints.
4
Identify the port and transport protocol for Dynamic Host Configuration Protocol (DHCP).
DHCP uses UDP ports 67 (server) and 68 (client).
DHCP relies on connectionless UDP broadcasts across port 67 for server reception and port 68 for client responses during address allocation.

Key Concept

Standard TCP/UDP Port Assignments for Network Protocols
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Topics

Networking Ports and Protocols

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