Basic Computer: Networking Basics MCQ — 15 Practice Questions with Answers

Explanation

In star topology, each computer or node is connected to a central device, commonly a hub or switch. That makes the assertion true. The reason is also true because this central device helps pass data between the connected computers. More importantly, the reason explains the assertion: the central device is not just present physically; it is the communication point through which connected devices exchange data. Therefore, both A and R are true, and R correctly explains A.

Explanation

A Local Area Network, or LAN, connects computers within a limited area such as a room, office, school lab or one building. The key cue in the stem is that all computers are inside one building and are sharing local resources like a printer and files. A WAN is used when the area is much larger, for example across cities or countries. The Internet is global. Therefore, the lab arrangement described here is a LAN.

Explanation

HTTP is the protocol used for transferring web pages, so I matches 2. An IP address identifies a device on a network, so II matches 4. A URL is the address of a web resource, so III matches 1. A web browser is the software used to access and view websites, so IV matches 3. The complete matching is I-2, II-4, III-1, IV-3. This question checks the difference between a protocol, an address, and application software.

Explanation

An IP address is used to identify a device on a network so that data can reach the correct destination. In IPv4, it is commonly written as numbers separated by dots. The question asks for the incorrect statement. Devices on the same network cannot all have exactly the same IP address, because that would create an address conflict and make delivery unclear. Therefore, the statement that every device has the same IP address is the incorrect one.

Explanation

The question asks for the incorrect statement. An IP address is used to identify a device on a network, so option A is correct as a fact. Wi-Fi commonly provides wireless network access through radio waves, and Ethernet is a standard wired LAN technology, so B and C are also correct facts. Bluetooth, however, is meant for short-range personal-area communication, such as connecting a phone with earphones, a keyboard or another nearby device. It is not designed for countrywide long-distance networking. Therefore, D is the incorrect statement.