Disabling an xinetd service | LinuC Level 1 102 Exam original practice question

1.10.2Basic

Prevent telnet from being offered by /etc/xinetd.d/telnet.

Which value is appropriate?

Hint 1: Focus on security boundaries

Separate protected account data, service availability directives, and packet-filtering policy before comparing the choices.

Hint 2: Key terms

Review the short definitions of protected account data, service controls, and firewall layers involved.

disable: The xinetd per-service directive that controls whether a service is offered.
xinetd.d: The directory containing per-service xinetd configuration files.
Firewall: A separate network-policy layer that filters traffic reaching a service.
Service availability: Whether a service supervisor offers a service, distinct from packet reachability.

Detailed explanation

Correctdisable = yes

Correct. It disables the xinetd service.

Incorrectenable = no

Incorrect. The conventional option is disable, not enable=no.

Incorrectstop = true

Incorrect. stop is not the xinetd per-service directive.

Incorrectfirewall = deny

Incorrect. Firewall policy is a separate layer.

An example you can run in a temporary verification environment.

printf '%s
' 'service telnet { disable = yes }' | grep 'disable = yes'

service telnet { disable = yes }

Foundation review

Sensitive authentication data stored separately from ordinary account records.

Whether a service can start automatically or be activated on demand.

A host firewall rule set that permits or rejects network packets.

Question IDKL-102-1141

EnvironmentGNU grep / 模擬設定のみ

Last technical review2026-08-20

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