Before boarding a flight you want to switch off the wireless radio with nmcli, leaving the wired connection working. Which command does that?
LPIC-1 Exam 102-500, objective 109. Networking fundamentals easy
Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.
Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.
How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
The options
Correct nmcli radio wifi off
Correct. The radio object controls the wireless transmitter itself, so the adapter stops scanning and cannot reassociate until `nmcli radio wifi on` is issued.
Not correct nmcli networking off
Wrong. This disables all NetworkManager-managed networking, wired connections included, which is more than was asked.
Not correct nmcli device disconnect wlp3s0
Wrong. It drops the current association and marks the device as manually disconnected, but the radio remains powered and the device is still available for a later explicit connection.
Not correct nmcli connection down cafe-guest
Wrong. Deactivating one profile leaves the radio on, and autoconnect may bring up another known network moments later.
Why
nmcli is organised by object: general, networking, radio, connection, device and monitor. `radio wifi on|off` toggles the transmitter, `networking off` kills every managed interface, and the connection and device objects act on one profile or one adapter. `nmcli radio wifi` with no argument reports the current state.
Where this comes from
- Cited
- manual page nmcli(1)
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 109 and space the ones you get wrong.
More questions on this objective
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