A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?

  • Telnet
  • FTP
  • SSH
  • DHCP
Explanation & Hint:

The client is requesting DHCP (Dynamic Host Configuration Protocol) service. In the context of networking, port numbers are used to identify specific services or protocols. Port number 67 is the port designated for the server side of the DHCP service. DHCP clients use port 68.

Here’s a brief overview of the services and their default ports for context:

  • Telnet uses port 23.
  • FTP (File Transfer Protocol) has two ports, 20 for data transfer and 21 for control (command).
  • SSH (Secure Shell) uses port 22.
  • DHCP (Dynamic Host Configuration Protocol) server listens on port 67, and the DHCP client listens on port 68.

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