Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
121
Which type of network device is typically assigned a permanent IP address?
Answer:
Server
Servers are typically assigned permanent, or static, IP addresses to ensure that clients can consistently locate and connect to them. If a server's address changed frequently, it would be difficult for users to access the services hosted on that machine.
122
Which type of network is designed to provide connectivity over a large geographical area?
Answer:
WAN
A Wide Area Network (WAN) is a telecommunications network that extends over a large geographical distance. Unlike LANs or MANs, which are limited to smaller areas like buildings or cities, WANs connect multiple smaller networks across countries or continents, often utilizing leased telecommunication lines.
123
What is the term for a network designed to share data, software, and hardware resources among multiple users operating microcomputers within a limited geographic area?
Answer:
LAN
A Local Area Network (LAN) is specifically designed to connect computers and devices within a confined space, such as an office, home, or building. It enables efficient sharing of resources like printers, files, and applications among users, providing high data transfer speeds compared to wider networks.
124
Which network type is specifically designed to provide high-speed data transmission across a city-wide area, exceeding the capabilities of a LAN?
Answer:
MAN
A Metropolitan Area Network (MAN) is designed to cover a larger geographical area than a LAN, typically an entire city or a large campus. It provides high-speed connectivity and is often used to interconnect multiple LANs within a metropolitan region.
125
Microwave transmission and fiber optic cables are classified as which of the following?
Answer:
Communication Links
Microwave transmission and fiber optic cables serve as the physical pathways or media through which data signals travel between devices. These are collectively referred to as communication links or transmission media, enabling the transfer of information across a network.
126
A Local Area Network (LAN) is typically composed of which of the following components?
Answer:
all of the above
A functional Local Area Network (LAN) requires a combination of hardware and software. This includes physical network devices like switches and routers, the cabling infrastructure (such as Ethernet) to connect them, and the necessary application software to manage communication, security, and resource sharing among the connected computers.
127
Which type of cable consists of two insulated copper wires twisted together to reduce electromagnetic interference?
Answer:
Twisted pair wire
Twisted pair cabling is a common type of wiring where pairs of insulated copper wires are twisted around each other to minimize crosstalk and electromagnetic interference from external sources.
128
Which term describes the physical channel or path through which data signals travel between network devices?
Answer:
Medium
The transmission medium is the physical pathway, such as copper wire, fiber optic cable, or wireless airwaves, that carries the electromagnetic signals representing data from one point to another.
129
Which transmission mode allows data to be sent and received simultaneously over a communication channel?
Answer:
Full-duplex
Full-duplex communication allows data to flow in both directions at the same time. This is similar to a telephone conversation where both parties can speak and listen simultaneously, unlike half-duplex, where only one party can transmit at a time, or simplex, which is unidirectional.
130
In a WAN environment, what type of software enables a personal computer to function as a remote terminal?
Answer:
Terminal emulation software
Terminal emulation software allows a personal computer to mimic the behavior of a mainframe terminal. This enables the PC to connect to a remote host computer over a network, allowing the user to interact with the host system as if they were directly connected to it.