An OpenBSD administrator has set the securelevel to 1 in /etc/sysctl.conf. After a reboot, the system boots at securelevel 1. The administrator now needs to perform a task that requires securelevel 0. What must be done?

Edit /etc/sysctl.conf to set `kern.securelevel=0` and run `sysctl -f /etc/sysctl.conf`

Run `sysctl -w kern.securelevel=0` and then reboot

Reboot the system after temporarily removing the securelevel line from /etc/sysctl.conf

Run `sysctl -w kern.securelevel=0` as root

In BSD systems, what is the primary purpose of a kernel Management Information Base (MIB)?

To manage the file system layout and mount points for all storage devices.

To provide a hierarchical namespace of tunable kernel parameters that can be inspected and modified.

To store a log of all kernel panics and system crashes for post-mortem analysis.

To define the list of device drivers compiled into the kernel at build time.

What is required to raise the securelevel of a BSD system?

Any user can raise the securelevel with the sysctl command.

A system reboot is required to raise the securelevel.

Root privileges and the ability to only raise, never lower, the level.

The securelevel can only be raised by recompiling the kernel.

LPI BSD Specialist

Domain 1Objective 5

711.5 BSD Kernel Parameters and System Security Level (weight: 2) BSD-SPECIALIST Practice Questions (Page 3)

Part of the Topic 711: BSD Installation and Software Management domain, which makes up ~21% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–13 in this domain), expect 1–3 from this objective — we provide 23 practice questions to prepare you well beyond it. (estimate)

23questions here

5free pages

8concepts

Questions 11–15

11application · medium
An OpenBSD administrator has set the securelevel to 1 in /etc/sysctl.conf. After a reboot, the system boots at securelevel 1. The administrator now needs to perform a task that requires securelevel 0. What must be done?
Select an answer first
12foundation · easy
In BSD systems, what is the primary purpose of a kernel Management Information Base (MIB)?
Select an answer first
13expert · medium
A FreeBSD server hosts a database that must be protected from unauthorized writes to its mounted disk. The security policy also requires that the system time cannot be changed by any process. The administrator plans to use securelevels. What is the minimum securelevel that satisfies both requirements?
Select an answer first
14foundation · easy
Which file is the standard location for making kernel MIB changes persistent across reboots on most BSD systems?
Select an answer first
15foundation · easy
What is required to raise the securelevel of a BSD system?
Select an answer first

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711.5 BSD Kernel Parameters and System Security Level (weight: 2) BSD-SPECIALIST Practice Questions (Page 3)

Questions 11–15

An OpenBSD administrator has set the securelevel to 1 in /etc/sysctl.conf. After a reboot, the system boots at securelevel 1. The administrator now needs to perform a task that requires securelevel 0. What must be done?

In BSD systems, what is the primary purpose of a kernel Management Information Base (MIB)?

Which file is the standard location for making kernel MIB changes persistent across reboots on most BSD systems?

What is required to raise the securelevel of a BSD system?

Keep studying — Topic 711: BSD Installation and Software Management