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
6001
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.
6002
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.
6003
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.
6004
Which line type best facilitates interactive applications?
Answer:
Full duplex lines
Interactive processing depends on simultaneous two-way communication, provided by full duplex lines.
6005
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.
6006
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.
6007
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.
6008
Which of the following is not a characteristic of a WAN?
Answer:
High speed
While WAN speeds are improving, they are generally slower than LANs due to the long distances involved.
6009
Which network type is generally the most secure?
Answer:
LAN
LANs are generally more secure than WANs because they are privately owned and have a smaller, more controlled area to protect.
6010
What happens to a packet when it arrives at a router?
Answer:
The router examines the packet's destination address and sends it on the best path.
This is the fundamental process of routing in a packet-switched network.