Recognizing Postfix's role | LinuC Level 1 102 Exam original practice question

1.09.3Basic

Identify Postfix's primary role on a Linux host.

Which description is correct?

Hint 1: Focus on mail roles

Separate alias expansion, user forwarding, message submission, queue inspection, and MTA routing roles.

Hint 2: Key terms

Review the short definitions of alias expansion, forwarding, submission, queueing, and delivery involved.

Postfix: A modular mail transfer agent that accepts, queues, routes, and delivers mail.
MTA: A mail transfer agent that relays or delivers messages between mail systems.
SMTP: A protocol used to submit and transfer mail between mail agents.
Mail queue: The set of messages waiting for an MTA to deliver them.

Detailed explanation

IncorrectDNSの権威serverとしてzoneを配布する

Incorrect. Authoritative DNS zones are handled by DNS servers such as BIND.

Incorrectsystem journalをbinary形式で保存する

Incorrect. systemd-journald stores the system journal.

CorrectSMTPを用いてメールを受け付け、queueし、配送するMTAである

Correct. Postfix is an SMTP mail transfer agent.

IncorrectNTPでsystem clockを同期する

Incorrect. ntpd or chronyd synchronize clocks.

An example you can run in a temporary verification environment.

postconf mail_version 2>/dev/null || printf '%s
' 'Postfix: MTA'

Postfix versionまたはMTA確認文字列

Foundation review

A mail transfer agent that accepts, routes, and queues messages.

Rules that map a local address to one or more delivery destinations.

Temporary storage for messages waiting to be delivered or retried.

Question IDKL-102-1113

EnvironmentPostfix postconfがあれば読取のみ

Last technical review2026-08-13

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