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
41
What is the standard definition of the networking term 'MAC'?
Answer:
Media Access Control
MAC stands for Media Access Control. In networking, a MAC address is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This layer 2 address is essential for data link layer communication in Ethernet and Wi-Fi networks.
42
Which transmission technique relies on modulation to convey information?
Answer:
Broadband
Broadband transmission uses modulation to carry multiple signals simultaneously over a single medium by dividing the available frequency range into different channels. This allows for higher data rates and longer distance transmissions compared to baseband signaling.
43
Coaxial and fiber optic cables are classified as which type of transmission media?
Answer:
Guided
Guided media, also known as bounded or wired media, refers to physical paths through which signals are directed. Coaxial cables, twisted pair cables, and fiber optic cables are all examples of guided media because they provide a physical conduit for the signal.
44
Which transmission medium is typically not utilized in a standard Local Area Network (LAN) configuration?
Answer:
Telephone line
While LANs commonly use twisted pair, fiber optic, or coaxial cables for high-speed data transmission, standard telephone lines are generally associated with Wide Area Network (WAN) connections or legacy dial-up access rather than the high-bandwidth infrastructure typical of modern LANs.
45
Which network type is most appropriate for connecting multiple campus locations situated within the same city?
Answer:
MAN
A Metropolitan Area Network (MAN) is specifically designed to connect various sites or campuses within a city or metropolitan region. It provides the necessary bandwidth and geographic reach to link these locations effectively, acting as a bridge between local and wide area networks.
46
What term describes a network that spans a large geographic distance, such as an entire country or continent?
Answer:
WAN
A Wide Area Network (WAN) is a telecommunications network that extends over a large geographic area for the primary purpose of computer networking. WANs are often established with leased telecommunication circuits and can connect multiple smaller networks, such as LANs and MANs.
47
The baud rate, which serves as a unit for measuring data transmission speed, is equivalent to which of the following?
Answer:
1 bit per second
Baud rate represents the number of signal changes or symbols per second. In simple digital communication systems, one baud is equivalent to one bit per second, measuring the speed of data transmission.
48
Which transmission method involves sending data in organized blocks rather than individual bits?
Answer:
Synchronous transmission
Synchronous transmission is a method where data is sent as a continuous stream or in large blocks, synchronized by a common clock signal between the sender and receiver. This ensures efficient data transfer compared to character-by-character asynchronous methods.
49
What is the term for the physical path through which a message is transmitted?
Answer:
Medium
The transmission medium is the physical material or space that provides the path for signals to travel from the source to the destination in a communication system.
50
What is the standard maximum cable length for Shielded Twisted Pair (STP) before signal degradation occurs?
Answer:
100m
For most Ethernet standards utilizing twisted pair cabling, including STP and UTP, the maximum recommended cable length for a single segment is 100 meters. Beyond this distance, signal attenuation becomes significant, often requiring repeaters or switches to maintain data integrity.