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Objective 4.1

N10-009

Explain the importance of basic network security concepts.

Objective 4.1 sits in Network Security, which carries 14% of the Network+ exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.

Objective title verbatim from the official objectives. CompTIA exam page ↗

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

4-1Network Security

A contractor's VPN access is under review and you must show when they connected and how long each session lasted. The RADIUS server holds the data. Which AAA function recorded it?

Authentication recordsAuthentication settles whether the credentials are genuine, a decision reached before any session exists.
Certificate recordsCertificates can carry the identity used during authentication, but issuing one records no session activity.
Authorization recordsAuthorization decides which resources a connection may reach, so it shapes access rather than describing it afterwards.
Accounting recordsCorrect · your answerCorrect. This is the log written once the connection is allowed.

Correct.

Checked against learn.microsoft.com, August 2026

Concept

Access control splits into proving who someone is, deciding what they may reach, and keeping a record of what happened. The three answer different questions, and only the last is written after the fact.

Why D

Once credentials are authenticated and the attempt is authorized, the RADIUS server logs the network access connection, and that log is the evidence a session took place and how long it ran.

Source

If user credentials are authenticated and the connection attempt is authorized, the RADIUS server authorizes user access based on specified conditions. Then the RADIUS server logs the network access connection in an accounting log.

Microsoft Learn: Network Policy Server (NPS) overview, checked August 2026
#aaa#radius#accounting

Now you: objective 4.1 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

4-1Network Security

An operator runs twelve VPN and wireless access servers, each holding its own account list. Which benefit does moving to RADIUS deliver?

Sample question 2 of 3

4-1Network Security

Requests for users in an untrusted forest must be settled by that forest's own directory. Which role should the local deployment take?

Sample question 3 of 3

4-1Network Security

An administrator adds a host firewall rule allowing TCP 8080 from the management subnet, but the traffic is still refused. An older rule blocks TCP 8080 from all sources. What is happening?

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Read the sources

These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.

More objectives in Network Security