Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
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
Distant office LANs can join as part of a corporate:
Answer:
WAN
Wide Area Networks (WANs) interconnect geographically spread local networks.
122
What term describes the amount of space available for sending/receiving data over the internet?
Answer:
Bandwidth
Bandwidth refers to the maximum data transfer capacity of a network connection, typically measured in bits per second.
123
What is throughput?
Answer:
The actual measured speed of a network at a particular time
Throughput is the real-world performance of a network, which is often lower than the theoretical bandwidth due to factors like latency, congestion, and protocol overhead.
124
What is the primary hardware component of a router?
Answer:
A CPU
A router is essentially a specialized computer with a CPU, memory, and multiple network interfaces.
125
The oldest packet-switching protocol for WANs, designed for noisy dial-up lines and still in use, is \_\_\_\_.
Answer:
X.25
X.25 is an early packet-switching protocol known for its reliability and error-checking capabilities, making it suitable for older, less reliable networks.
126
What is a MAC address?
Answer:
The physical address of a network interface card (NIC)
A MAC (Media Access Control) address is a unique identifier assigned to a network interface controller for use as a network address in communications within a network segment.
127
Which line type best facilitates interactive applications?
Answer:
Full duplex lines
Interactive processing depends on simultaneous two-way communication, provided by full duplex lines.
128
Which device uses MAC addresses to make forwarding decisions?
Answer:
Switch
A switch builds a MAC address table to learn which devices are connected to which ports, allowing it to forward frames only to the intended recipient.
129
What is the biggest security risk for wireless networks?
Answer:
Unauthorized access
Because wireless signals can travel through walls, it is possible for unauthorized users to access the network if it is not properly secured.
130
Which model offers better performance when many users access the same resource?
Answer:
Client-server model
A powerful, dedicated server can handle simultaneous requests from many clients more efficiently than a peer computer that is also being used for other tasks.