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
91
What is a "dead spot" in a wireless network?
Answer:
An area where the Wi-Fi signal is weak or non-existent
Dead spots are areas where the wireless signal is blocked or too far from the access point to provide a stable connection.
92
Which device uses IP addresses to make forwarding decisions?
Answer:
Router
Routers examine the destination IP address of a packet to determine the best path to send it to its destination network.
93
The Internet is:
Answer:
A worldwide network of interconnected computers
The Internet connects computers globally using standardized protocols.
94
If a router's buffer is full and a new packet arrives, what happens?
Answer:
The packet is dropped (packet loss).
This is a common cause of packet loss during periods of network congestion.
95
What is a "VPN" (Virtual Private Network)?
Answer:
A service that creates a secure, encrypted connection between your computer and the internet
A VPN can help to protect your privacy and security, especially when you are using public Wi-Fi.
96
What does MAN stand for?
Answer:
Metropolitan Area Network
MAN stands for Metropolitan Area Network, a network that covers a geographic area the size of a city.
97
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.
98
What is "HTTPS"?
Answer:
A secure version of the HTTP protocol that encrypts the communication between your browser and the web server
You should always look for "https://" at the beginning of the URL and a padlock icon in the address bar when you are entering sensitive information on a website.
99
What is the medium of transmission for a wired network?
Answer:
Physical cables
Wired networks use physical media like copper wires or fiber optic cables to transmit data.
100
What is the name of the organization that manages the global domain name system?
Answer:
ICANN
The Internet Corporation for Assigned Names and Numbers (ICANN) is a non-profit organization responsible for coordinating the maintenance and procedures of several databases related to the namespaces of the Internet.