Computer Networks MCQ Quiz - Objective Question with Answer for Computer Networks - Download Free PDF

The correct answer is dial up

Key Points

• Dial-up: ✅ Dial-up connection uses a standard telephone line and a modem to connect to the internet. It is one of the earliest methods of accessing the internet and is relatively slow compared to modern technologies.
• Digital: ❌ The term "digital" refers to data in binary form, not a specific internet connection type.
• Fiber optic: ❌ Fiber optic connections are modern, high-speed internet connections using light signals through fiber cables, not phone lines.
• Dish: ❌ Dish refers to satellite internet, which uses satellite dishes for connectivity, not telephone lines.

Additional Information

• Speed: Dial-up speeds usually max out at 56 kbps, much slower than broadband or fiber internet.
• Usage: Dial-up is rarely used today except in extremely remote areas with no broadband access.

Hence, the correct answer is: option 2) dial up

The correct answer is option 1: Wireless

Key Points

Radio waves are a type of electromagnetic wave used to transmit data over distances without the use of physical conductors like cables or wires. This form of transmission is known as wireless communication.

Examples of wireless communication include:

• Wi-Fi
• Bluetooth
• Mobile networks (4G/5G)
• Satellite communication
• FM/AM radio broadcasts

Explanation of options:

• Option 1 – Wireless: ✅ Correct. Radio waves are a form of wireless communication.
• Option 2 – Guided: ❌ Guided media refers to communication through cables like fiber optics or copper wires.
• Option 3 – Cable base, connection: ❌ Another way of describing wired or guided media.
• Option 4 – Wired: ❌ Involves physical cables, not radio waves.

Hence, the correct answer is: option 1: Wireless

The correct answer is Microsoft Excel.

Key Points

• The .xls file extension is primarily associated with Microsoft Excel, a spreadsheet program developed by Microsoft.
• It is used to store data in tabular format, which includes rows and columns for organizing information such as numbers, text, and formulas.
• The .xls format was the default file extension for Excel workbooks before the introduction of the newer .xlsx format in Excel 2007.
• It supports features like data analysis, charting, pivot tables, and macros, making it widely used in business, finance, and data management domains.
• The .xls format is a binary file format, which means it stores data in a non-text format that is optimized for performance.

Additional Information

• Microsoft Excel File Formats
  • The .xlsx format was introduced in Excel 2007 as part of the Office Open XML standard and is more efficient than .xls.
  • Other Excel file extensions include .xlsm (macro-enabled workbooks) and .csv (comma-separated values).
• Spreadsheet Basics
  • A spreadsheet is a software application that enables users to store, manipulate, and analyze data in a grid format of rows and columns.
  • It is commonly used for calculations, data visualization, and creating reports.
• Excel Features
  • Excel offers advanced tools like conditional formatting, data validation, and what-if analysis.
  • It supports integration with other Microsoft Office applications like Word and PowerPoint.
• Historical Context
  • Microsoft Excel was first released in 1985 for Apple Macintosh and later for Windows in 1987.
  • It has since become the most widely used spreadsheet software globally.

The type of wired transmission medium that has a core of refined glass in computer networking is called optical fiber.

Key Points

• Optical fiber is a type of wired transmission medium used in computer networking to transmit information using light signals.
• The core of an optical fiber is made of highly refined glass or plastic that is designed to carry light over long distances with minimal signal loss.
• Due to its high bandwidth and low attenuation, optical fiber is widely used in high-speed internet connections, telecommunications, and other applications where fast and reliable data transfer is essential.

Additional Information

• Shielded twisted pair: A type of cable used for networking that consists of pairs of insulated wires wrapped in a conductive shield. 
• Unshielded twisted pair: A type of cable used for networking that consists of pairs of insulated wires twisted together without a conductive shield.
• Coaxial cable: A type of cable used for networking that consists of a center conductor surrounded by a dielectric insulator, a conductive shield, and an outer jacket.

The correct answer is Option 2.

Key Points

• A Slammer is a type of virus, so A matches IV.
• Microwave communication is typically uni directional, so B matches II.
• Radiowave communication is generally omni directional, so C matches I.
• White hats are known as ethical hackers, so D matches III.

Additional Information

• Slammer, also known as SQL Slammer, was a computer worm that caused a denial of service on some Internet hosts and dramatically slowed down general Internet traffic.
• Microwave communication uses high-frequency radio waves and is used in various communication systems, including satellite and cellular networks.
• Radiowave communication is used for various applications, including broadcasting, communications satellites, and Wi-Fi.
• White hats are cybersecurity experts who help organizations identify and fix security vulnerabilities to protect against malicious hacking.

The correct answer is a programming language.

• Python is an interpretable, high-level and general-purpose programming language.
  • It created by Guido van Rossum and first published in 1991, Python's design philosophy stresses the readability of code with its impressive use of substantial white space.
  • The goal of its language constructs and object-oriented approach is to help programmers write simple, logical code for small and large projects. Python is dynamically typed and dust-collected.
  • It supports multiple programming paradigms, including structured (especially procedural), object-oriented, and functional programming.
  • Due to its extensive standard library, Python is also defined as a "batteries included" language.

Important Points

• Python 2.0, launched in 2000, added features like list comprehensions and a waste management system with comparison numbering.
• Python 3.0, released in 2008, was a big language upgrade that wasn't entirely backwards-compatible, and a lot of Python 2 code didn't run unmodified on Python 3.
• The Python 2 language was formally retired in 2020 (first set for 2015) and Python 2.7.18 is the final Python 2.7 version and hence the last Python 2 release.

Local Area Networks (LAN) is widely used to share resources and exchange information by connecting personal computers and workstations in the company offices and factories. A LAN is a network that is limited to an area such as a building or school. In a LAN, computers, and hardware such as printers can be connected by cable (copper wiring), fiber optic cabling (glass fibers), or using a wireless (radio waves) connection.

Embedded System 

• It is a microprocessor-based computer hardware system with software that is designed to perform a dedicated function, either as an independent system or as a part of a large system.
• At the core is an integrated circuit designed to carry out computation for real-time operations.

Router 

• It is the piece of network hardware that allows communication between your local home network—like your personal computers and other connected devices—and the internet.
• The router used in home and small networks is more accurately called a residential gateway.
• It is a combination of hardware and software which links two parts of the same LAN by directing messages to the correct node.

A hybrid computer

• It is a computing system that combines both digital and analog components.
• Traditionally, the analog components of the computer handle complex mathematical computations.
• The digital components take care of logical and numerical operations, in addition to serving as the controller for the system.

A microprocessor

• It is an integrated circuit (IC) that incorporates core functions of a computer’s central processing unit (CPU).
• It is a programmable multipurpose silicon chip, clock-driven, register-based, accepts binary data as input, and provides output after processing it as per the instructions stored in the memory.

Hence, it is clear from the above points that a combination of hardware and software which links two parts of the same LAN or two compatible LANs by directing messages to the correct node is called Router.

Computer networking is the term for a network of connected computers that may communicate and share resources. 

Key Points

• These networked devices transmit data through wireless or physical technologies using a set of guidelines known as communications protocols.
• There are different types of computer networks. 
• LAN (Local Area Network) is a computer network that connects devices within a small geographical area, such as a building or a campus.
• MAN (Metropolitan Area Network) is a larger network than LAN, covering a metropolitan area, such as a city.
• WAN (Wide Area Network) is the largest type of computer network, covering a large geographical area, such as a country or the entire world.

Therefore, the ascending order of geographical area implied by these networks is LAN⇒ MAN⇒ WAN.

Additional Information

• Communications protocols are networked devices transmit data through wireless or physical technologies using a set of guidelines. 

The type of wired transmission medium that has a core of refined glass in computer networking is called optical fiber.

Key Points

• Optical fiber is a type of wired transmission medium used in computer networking to transmit information using light signals.
• The core of an optical fiber is made of highly refined glass or plastic that is designed to carry light over long distances with minimal signal loss.
• Due to its high bandwidth and low attenuation, optical fiber is widely used in high-speed internet connections, telecommunications, and other applications where fast and reliable data transfer is essential.

Additional Information

• Shielded twisted pair: A type of cable used for networking that consists of pairs of insulated wires wrapped in a conductive shield. 
• Unshielded twisted pair: A type of cable used for networking that consists of pairs of insulated wires twisted together without a conductive shield.
• Coaxial cable: A type of cable used for networking that consists of a center conductor surrounded by a dielectric insulator, a conductive shield, and an outer jacket.

Peripheral devices: A peripheral device is any device that can be connected to a computer. This term includes monitors, keyboards, mouse, webcams, drawing pads, joystick, modems, printers, scanners, interactive whiteboards, drive wheel, and so on.

Input devices: Any device that is capable of inputting information into a computer system, for example, keyboard, microphone, mouse, scanner, webcam, and so on are known as input devices.

Output devices: The output devices are basically meant for anything that comes out of a computer after being processed. It includes the monitor, headphones, printers, speakers, projectors, plotters, and VDUs (visual display units).

Storage devices: Computer data storage, often known as memory refers to the computer components and recording media which retain the digital data. Memory refers to the temporary internal storage areas within a computer. The term memory is usually used as a shorthand for physical memory and it refers to the actual chips capable of holding data. Some computers also use virtual memory, which expands physical memory onto a hard drive.

Therefore, when we give input through scanners, trackballs, microphones, touch screens we can see/access those input data over the screen of the computer, hence these devices can be put under the category of input peripheral devices.

Concept:

Process ID (PID)

This is a unique number that helps in identifying a hardware product or a registered software product.

It identifies each running processes in an operating system.

IP address

An IP address is a unique address that identifies the device on the internet or a local network.

• IP stands for the Internet Protocol which is having the set of rules governing the format of data sent via internet or local network.
• This is differentiated into different classes based on the width.

SYSID

The SYSID file records the network interface addresses that the File Server registers in the volume location Database for the local file server machine.

Each time the File Server restarts, it builds a list of interfaces on the local machine by reading the /usr/afs/local/NetInfo file, if it exists.

Conclusion:

IP address is the identification number given to the computer connection to a network .

RSS (Rich Site Summary):

• RSS (Rich Site Summary) is a format for delivering regularly changing web content.
• Many news-related sites, weblogs, and other online publishers syndicate their content as an RSS Feed to whoever wants it.
• The benefits of RSS include solving a problem for people who regularly use the web. It allows a user to easily stay informed by retrieving the latest content from the sites you are interested in.
• It saves time by not needing to visit each site individually. It also ensures privacy,
• Rich Site Summary (RSS) is actually a very useful tool for working on Web-service technology.

Myspace:

• Myspace is an American social networking service. 
• From 2005 to 2008, it was the largest social networking site in the world, reaching more than 100 million users per month.
• Myspace had a significant influence on technology, pop culture, and music

Facebook:

• Facebook is the biggest social media site, with more than two billion people using it every month.
• There are more than 65 million businesses using Facebook Pages and more than six million advertisers actively promoting their business on Facebook, which makes it pretty safe as well.
• It is the most useful social networking site of choice for most students.

Wiki: Wikis can be used when geographically dispersed team members need to collaborate. The wiki format is good for adding information and getting feedback from team members 

The correct answer is All of the options

Key Points

Switching techniques:

• Switched communication networks are those in which data transferred from source to destination is routed between various intermediate nodes. 
• Switching is the technique by which nodes control or switch data to transmit it between specific points on a network.
• The switch is a mechanism that makes it possible to interconnect links to form a large network. 
• Generally, switches have some input ports and output ports.
• The number of ports in a switch is limited to less than five in normal cases. 
• The role of a switch in a network is to receive messages, data, packets from one link connected to the switch and transmit the received information to some other node connected to the switch by another link.
   

There are 3 common switching techniques:

1. Circuit Switching - In the circuit switching, between two nodes there is a dedicated channel for the transmission of data. The circuit is dedicated between two nodes the channel guaranty the full bandwidth of the channel for the transmission. The circuit switching is mainly used for voice circuits.
2. Packet Switching - In this switching data are passed as several small packets. These packets are the small portion of the larger message broken into small packets. Each packet has some control instructions to process the data.
3. Message Switching - In message switching each node receives and stores data in a small memory called buffer. Next, the switch looks for another link of the router for forwarding the message. This link is selected by the routing. While some link is busy, the message is stored in the buffer space providing a queue priority for the message inside the buffer.

Thus, option 4 is the correct answer.

Local Area Networks:

• LANs are high speed, fault-tolerant data networks that cover a relatively small geographic area.
• They are widely used to connect personal computers and work stations in company offices and factories to share resources (e.g. files) and exchange information.
• A Local Area Network (LAN) is usually located on computers irrespective of their brands, it is not necessary to have one brand for using LAN.
• LAN offers computer users many advantages including shared access to devices and applications, file exchanges, file exchange between connected users, and communication between the users via electronic mail and other applications.

General Characteristics of LAN:

• The cost of setting up networks is usually low.
• Data transfer rates are- between 10 to 100 Mbps.
• Each device connected in the network can either operate standalone or in the Network.
• The area covered is small.
• All the connected devices in the network share the transmission media

An Internet service provider (ISP)

• It is an organization that provides services for accessing, using, or participating in the Internet.
• It connects people to the Internet and provides other allied services such as Web site building and hosting.
• An ISP has the equipment and the telecommunication line access required to have a point of presence on the Internet for the geographic area served. 
• Internet services typically provided by ISPs include Internet access, Internet transit, domain name registration, web hosting, Usenet service, and collocation.

The two main services provided by ISPs are:

• Web site building and hosting; done by an entity that provides space and management for individual or business Web sites; and
• Access providing; done by an entity that arranges for an individual or an organization to have access to the Internet. 

NOTE: Therefore, by the explanations provided above it is clear that both the statements are incorrect.

The correct answer is Ring

Key Points

• Ring Topology - In Ring Topology, all computers/ nodes/ devices are connected by a cable in a circular shape, in which each computer is connected to the nearby computer using a cable segment.
• The entire network is affected if any individual connection in a ring topology is broken.

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Additional Information

• Topology -  The arrangement of a network that comprises nodes and connecting lines via sender and receiver is referred to as network topology. Network Topology determines how the different nodes of the networks are connected and establish communication with each other.
• There are five types of topology that are generally used.

1. Ring Topology
2. Bus Topology
3. Star Topology
4. Mesh Topology
5. Tree Topology