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312-50V13 · Question #104

Which of the following represents the initial two commands that an IRC client sends to join an IRC network?

The correct answer is A. USER, NICK. To join an IRC network, a client typically sends the NICK command to set its nickname, followed by the USER command to provide identifying user information.

Submitted by takeshi77· Mar 6, 2026Introduction to Ethical Hacking

Question

Which of the following represents the initial two commands that an IRC client sends to join an IRC network?

Options

  • AUSER, NICK
  • BLOGIN, NICK
  • CUSER, PASS
  • DLOGIN, USER

How the community answered

(67 responses)
  • A
    94% (63)
  • B
    1% (1)
  • C
    3% (2)
  • D
    1% (1)

Why each option

To join an IRC network, a client typically sends the NICK command to set its nickname, followed by the USER command to provide identifying user information.

AUSER, NICKCorrect

When an IRC client connects to an IRC server, the first two commands it sends are typically NICK to define the user's chosen nickname and USER to provide the username, hostname, servername, and realname. These commands are fundamental for establishing the client's identity on the IRC network before joining channels.

BLOGIN, NICK

LOGIN is not a standard IRC command used for initial connection and identity establishment; NICK is correct, but the pairing is wrong.

CUSER, PASS

While PASS (password) can be sent if required by the server or user, it's not one of the two *initial* mandatory commands for identity, and NICK is a more fundamental second command than PASS.

DLOGIN, USER

LOGIN is not an IRC command for initial connection, and while USER is correct, LOGIN is not.

Concept tested: IRC client initial connection commands

Source: https://datatracker.ietf.org/doc/html/rfc1459#section-4.1.2

Topics

#IRC protocol#network protocols#client registration

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