CompTIA Tech+ (FC0-U71) Practice Exam

Correct: C — separate SSIDs on different VLANs. Putting guest and employee traffic on different VLANs isolates them at the network layer, so guests cannot reach internal resources even on shared access points.

Why not the others: two SSIDs on one VLAN (A) still share a broadcast domain, so the traffic is not truly separated; one SSID with two passwords (B) places everyone on the same network; hiding the SSID (D) only stops it being advertised and is trivially discovered — it is obscurity, not security.

Correct: A — a VPN. A virtual private network builds an encrypted tunnel across the public internet, so internal resources can be reached as if the user were on-site, while the traffic stays confidential.

Why not the others: unencrypted RDP (B) exposes the session to interception; public FTP (C) sends credentials and files in cleartext; Telnet (D) is an unencrypted remote-shell protocol long superseded by SSH. None of the three protects data in transit.

Correct: B — check for resource-intensive applications. The troubleshooting methodology says to identify the problem and test a probable theory before changing hardware. A process pinning the CPU is the most common, least invasive cause of heat and fast drain.

Why not the others: replacing the battery (A) or buying a charger (C) is swapping hardware before a cause is confirmed — expensive and often wrong; disabling Wi-Fi (D) addresses neither the heat nor the drain in any meaningful way.

Correct: A — endpoint security software. Endpoint controls can block or allow USB devices by policy centrally, which is enforceable and reversible without touching hardware.

Why not the others: removing ports (B) is destructive and impractical at scale; a verbal instruction (C) is unenforceable; antivirus alone (D) scans for malware but does not govern which devices may connect.

Correct: A — disconnect from the network. Isolating a possibly infected machine first contains the threat and stops malware spreading or communicating out before you investigate.

Why not the others: rebooting (B) can trigger persistence mechanisms or destroy volatile evidence; running an update (C) does nothing for an active infection and delays containment; ignoring it (D) lets any compromise spread.

Correct: A — automatic updates. Cloud-delivered (SaaS) applications are maintained centrally by the provider, so users always run the current version without per-device patching.

Why not the others: manual installation (B), limited compatibility (C), and higher local hardware demand (D) are characteristics of locally installed software — the very disadvantages cloud delivery removes.

Correct: C — a missing or corrupt driver on this user’s machine. When everyone else prints fine, the printer, paper, and server are all working — the variable that is unique to the affected user is their own device, and a driver problem is the classic cause.

Why not the others: an offline printer (A), an out-of-paper printer (B), or a downed print server (D) would stop everyone from printing, which contradicts the scenario.

Correct: A — full-disk encryption. Encrypting the drive renders its contents unreadable without the key, so a thief who removes the disk or boots from other media still cannot access the data — this is protection of data at rest.

Why not the others: a login password alone (B) can be bypassed by pulling the drive into another machine; disabling Wi-Fi (C) is irrelevant to a stolen device; antivirus (D) addresses malware, not physical theft of data.

Correct: A — Boolean. A Boolean stores exactly one of two values, true or false, which is precisely the two-state requirement described.

Why not the others: an integer (B) holds whole numbers; a string (C) holds text; a float (D) holds numbers with a decimal component. None is constrained to two states, so each is the wrong tool for a simple flag.

Correct: A — a relational database. Relational databases organize data into tables of rows and columns and use primary and foreign keys to enforce relationships between them — exactly the structure described.

Why not the others: a NoSQL document store (B) is designed for unstructured or semi-structured data without rigid table relationships; a flat text file (C) has no enforced structure or keys; a spreadsheet macro (D) automates spreadsheet actions and is not a database at all.