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Communication Systems and Networks MCQ

1. What is a proxy server?

An edge device that acts on behalf of other devices.

A device that allows multiple computers to share a single Internet connection.

A device that connects two separate computer networks.

A computer server that stores website files and makes them available to users on the Internet.

Answer

Correct Answer: An edge device that acts on behalf of other devices.

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2. What is the definition of a protocol?

An agreed upon method for communication; a set of rules for communication.

A software program that provides network access.

A system that encrypts data before it is sent over a network.

A device that connects two computer networks.

Answer

Correct Answer: An agreed upon method for communication; a set of rules for communication.

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3. What is the main integrated circuit in a computer or computerized system?

Central processing unit (CPU)

Arithmetic logic unit (ALU)

Control unit (CU)

Answer

Correct Answer: Central processing unit (CPU)

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4. What is a port?

A place where ships dock

A unit of measurement

A physical interface on an electronic device; a differentiating logical identifier for an application or process.

A type of river boat

Answer

Correct Answer: A physical interface on an electronic device; a differentiating logical identifier for an application or process.

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5. What is the corporate edict that serves as the beginning of standards and procedures being developed and implemented called?

Standard

Policy

Procedure

Practice

Answer

Correct Answer: Policy

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6. What is the definition of "policy"?

An established corporate edict that serves as the beginning of standards and procedures being developed and implemented.

A principle or rule to guide decisions and actions

A set of instructions or guidelines

A plan or course of action

Answer

Correct Answer: An established corporate edict that serves as the beginning of standards and procedures being developed and implemented.

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7. What does ICMP stand for?

Internet Connection Measurement Protocol

Internet Control Mechanism Protocol

Internet Control Message Protocol

Internet Communication Measurement Protocol

Answer

Correct Answer: Internet Control Message Protocol

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8. What is the Internet Control Message Protocol (ICMP)?

The protocol used by the ping utility to send an echo request to the remote host in question

A music file format

A communication protocol

A cable television network

Answer

Correct Answer: The protocol used by the ping utility to send an echo request to the remote host in question

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9. What is a packet switched network?

A network characterized by constantly variable pathways, created on demand or permanently established, through a group of switches.

A network that uses a group of switches to create variable pathways

A network in which each frame of information sent has its own independent addressing information

A network in which information is forwarded over an arbitrarily chosen pathway.

Answer

Correct Answer: A network characterized by constantly variable pathways, created on demand or permanently established, through a group of switches.

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10. What is the data structure often associated with Layer-3 protocols?

Frame

Datagram

Packet

Application message

Answer

Correct Answer: Packet

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11. What is OSPF?

A link-state routing protocol that supports large private internetworks

A network layer protocol

A virtual private network

A data link layer protocol

Answer

Correct Answer: A link-state routing protocol that supports large private internetworks

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12. Which of the following is not a practical model in the industry?

The CIA Triad Model

The Five-layer IBM Model

The TCP/IP Model

The seven-layer OSI Model

Answer

Correct Answer: The seven-layer OSI Model

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13. The OSI model is represented as a stack of blocks with the ______ at the bottom.

Middle-numbered layer

Random-numbered layer

Highest-numbered layer

Lowest-numbered layer

Answer

Correct Answer: Lowest-numbered layer

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14. What is the preeminent reference model in the industry?

Ethernet Model

OSI model

Wi-Fi Model

TCP/IP model

Answer

Correct Answer: OSI model

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15. What is the primary difference between multimode and single-mode fiber optic cable?

Multimode fiber optic cable is used for shorter distances while single-mode fiber optic cable is used for longer distances.

Multimode fiber optic cable is made of glass while single-mode fiber optic cable is made of plastic.

Multimode fiber optic cable is used for longer distances while single-mode fiber optic cable is used for shorter distances.

Multimode fiber optic cable is used for LAN implementations while single-mode fiber optic cable is used for WAN implementations.

Answer

Correct Answer: Multimode fiber optic cable is used for shorter distances while single-mode fiber optic cable is used for longer distances.

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16. What type of fiber optic cable is best suited for long distance applications?

Single-mode

Twisted Pair

Multimode

Coaxial

Answer

Correct Answer: Single-mode

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17. What is the primary function of an Operating System?

The primary function of an Operating System is to store data.

The primary function of an Operating System is to manage the resources of the computer system.

The primary function of an Operating System is to run applications software.

The primary function of an Operating System is to provide a user interface.

Answer

Correct Answer: The primary function of an Operating System is to manage the resources of the computer system.

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18. What is an Operating System responsible for?

Managing hardware devices

Certain core functions

Allowing multiple applications to run simultaneously

Ensuring efficient data storage

Answer

Correct Answer: Certain core functions

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19. What is a node?

The central processing unit (CPU) of a computer

Any active device anywhere in a network.

A computer program

A software package

Answer

Correct Answer: Any active device anywhere in a network.

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20. What is the meaning of the term 'node'?

Any active device anywhere in a network

A passive device used in networking

The end of a network connection

A device used to connect a computer to the internet

Answer

Correct Answer: Any active device anywhere in a network

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21. Multiplexing is the combining of multiple sources of data traffic onto what?

A single server

A single computer

A single communications pathway

Multiple communications pathways

Answer

Correct Answer: A single communications pathway

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22. What does multiplexing refer to?

The separating of multiple sources of data traffic onto a single communications pathway

The combining of multiple sources of data traffic onto a single communications pathway

Both of these

None of these

Answer

Correct Answer: The combining of multiple sources of data traffic onto a single communications pathway

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23. What is the function of the motherboard?

The motherboard provides a common platform on which to install a system’s processor, memory, chipset, and adapter boards.

The motherboard is responsible for storing data

The motherboard is responsible for managing peripherals

The motherboard is responsible for processing data

Answer

Correct Answer: The motherboard provides a common platform on which to install a system’s processor, memory, chipset, and adapter boards.

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24. What is the main circuit board in a computer system called?

RAM

Processor

Hard Drive

Motherboard

Answer

Correct Answer: Motherboard

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25. What does DCE stand for in the context of data communications?

Data Crash Event

Data Communications Equipment

Data Control Element

Data Cache Exposure

Answer

Correct Answer: Data Communications Equipment

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26. What is the main purpose of mirroring?

Duplicating traffic

Forwarding only unknown traffic

Discarding traffic

Forwarding frames intended for all other interfaces

Answer

Correct Answer: Forwarding frames intended for all other interfaces

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27. What is the purpose of mirroring in Ethernet switches?

To forward only unknown traffic

To forward traffic intended for the device attached to a particular port

To forward frames intended for all other interfaces

To decrease traffic congestion

Answer

Correct Answer: To forward frames intended for all other interfaces

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28. What does the term 'memory' refer to when casually attributed to electronic devices?

Solid-state drives

Flash memory

Volatile chip-based primary storage known popularly as RAM (Random Access Memory)

Hard drives

Answer

Correct Answer: Volatile chip-based primary storage known popularly as RAM (Random Access Memory)

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29. What is the most common type of memory when referring to electronic devices?

Hard drives

RAM

Flash memory

Solid-state drives

Answer

Correct Answer: RAM

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30. In which of the following situations is a Man-in-the-Middle Attack possible?

When an attacker is not on the same system as the two legitimate communicating systems

When an attacker is on the same system as the two legitimate communicating systems

When an attackerinserts himself in between two illegitimate communicating systems

When an attacker inserts himself in between two legitimately communicating systems

Answer

Correct Answer: When an attacker inserts himself in between two legitimately communicating systems

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31. What family of cyber-attacks does Man-in-the-Middle belong to?

DoS Attacks

Password Attacks

DDoS Attacks

MITM

Answer

Correct Answer: MITM

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32. What is the main difference between load balancing and load sharing?

Load balancing is a more sophisticated way of sharing loads between multiple pathways.

Load sharing can be achieved simply by using multiple pathways to send data in the same general direction.

Load balancing seeks to adjust shared loads based on a criterion, up to and including maximizing throughput per pathway.

Load balancing and load sharing are the same thing.

Answer

Correct Answer: Load balancing seeks to adjust shared loads based on a criterion, up to and including maximizing throughput per pathway.

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33. What is latency?

The amount of delay in a communication pathway.

A measure of how well a system runs without slowing down.

A system designed to intercept and decipher coded communications.

Answer

Correct Answer: The amount of delay in a communication pathway.

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34. What is a LAN?

A network that is fully owned by an enterprise

A network consisting of all devices behind and including a single router interface

A network that uses a class of Layer-2 protocols limited to deployment on a WAN

A network that geographically spans a small area, such as a building or floor

Answer

Correct Answer: A network that geographically spans a small area, such as a building or floor

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35. What is the significance of jitter?

Jitter will underrun the buffer

Jitter is the variation in latency on a network

Jitter can be mitigated by proper buffering

Jitter can cause degradation in real-time connections

Answer

Correct Answer: Jitter can cause degradation in real-time connections

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36. What is the name for variation in the latency on a network?

Glitch

Packet loss

Latency

Jitter

Answer

Correct Answer: Jitter

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37. What does ISDN stand for?

Invalid Services Digital Network

Integrated Services Digital Network

Integrated Services Data Network

Internet Services Digital Network

Answer

Correct Answer: Integrated Services Digital Network

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38. Which of the following is an example of an IPv6 address?

10.1.1.1

192.0.2.128

172.31.254.1

2001:0db8:1234:5678:02ab:cdff:feef:1234

Answer

Correct Answer: 2001:0db8:1234:5678:02ab:cdff:feef:1234

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39. Why was IPv6 designed?

To improve upon IPv4

To provide more addresses than IPv4

To be easier to use than IPv4

To replace IPv4

Answer

Correct Answer: To replace IPv4

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40. How many bits are in an IPv4 address?

Answer

Correct Answer: 32

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41. What is the main purpose of IPsec?

To create virtual private networks

To provide security keys for endpoints

To secure IP traffic between two endpoints

To establish a confidential negotiation of a security association

Answer

Correct Answer: To secure IP traffic between two endpoints

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42. A network of networks is also known as?

An internetwork

A protocoal

A client

A server

Answer

Correct Answer: An internetwork

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43. What creates an internetwork?

When two or more wide-area networks are interconnected

When two or more autonomous networks are interconnected

When two or more metropolitan-area networks are interconnected

When two or more local-area networks are interconnected

Answer

Correct Answer: When two or more autonomous networks are interconnected

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44. What is the meaning of the word "interface"?

The common point of three or more lines

A software program

A physical port used for connectivity to a network or peripheral device

A device that helps two systems to communicate with each other

Answer

Correct Answer: A physical port used for connectivity to a network or peripheral device

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45. What is the generic center of a star-wired topology?

Hub

Bridge

Switch

Repeater

Answer

Correct Answer: Hub

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46. What is a hub?

A concentrator

A Layer-2 Ethernet device with multiple network interfaces

A Layer-1 Ethernet device with multiple network interfaces

A multiport repeater

Answer

Correct Answer: A Layer-1 Ethernet device with multiple network interfaces

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47. What is a host?

The operating system on which a hypervisor runs

An unnetworked device with an IP address

A networked device with an IP address

A mainframe computer system

Answer

Correct Answer: A networked device with an IP address

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48. What is the difference between hardware and software?

Hardware are the non-durable components of the computer system while software is a durable good.

Hardware is a non-durable good while software are the durable components of the computer system.

Hardware are the durable components of the computer system while software is a non-durable good.

There is no difference between hardware and software.

Answer

Correct Answer: Hardware are the durable components of the computer system while software is a non-durable good.

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49. What is the term for the durable components of a computer system?

Data

Apps

Software

Hardware

Answer

Correct Answer: Hardware

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50. What is the standard form of permanent storage for a computer system?

Compact disc

Hard drive

Floppy disk

USB flash drive

Answer

Correct Answer: Hard drive

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51. What is GUI?

Graphic User Interaction

Graphical User Index

Graphical User Interface

Graphical User Interference

Answer

Correct Answer: Graphical User Interface

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52. What is GPS?

Global Positioning System

Google Play Store

Gaming Platform System

Geocaching

Answer

Correct Answer: Global Positioning System

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53. What is the "default gateway?"

The first router on the internet

The router at the edge of a network

A multi-layer protocol converter

The default router on a subnetwork

Answer

Correct Answer: The default router on a subnetwork

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54. Before the term router was settled upon, what were routers called?

Bridges

Hosts

Gateways

Converters

Answer

Correct Answer: Gateways

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55. What does FTP stand for?

Foreign Trade Policy

Federal Tax Provision

First Time Parents

File Transfer Protocol

Answer

Correct Answer: File Transfer Protocol

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56. What ports are used in FTP's insecure form?

989 and 990

20 and 21

25 and 22

110 and 995

Answer

Correct Answer: 20 and 21

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57. Which port is used for transferring data in FTP?

990

989

Answer

Correct Answer: 20

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58. What is the basic data unit of Layer-2?

Layer-1

Bit

Protocol Data Unit

Frame

Answer

Correct Answer: Frame

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59. What is the most common LAN technology in use today?

FDDI

ATM

Ethernet

Token Ring

Answer

Correct Answer: Ethernet

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60. Which of the following is true about Ethernet?

It is a WAN technology

It is a Layer-4 protocol

It is a Layer-2 protocol

It is a Layer-3 protocol

Answer

Correct Answer: It is a Layer-2 protocol

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61. What is DSL?

A satellite internet service

A broadband internet-access circuit based on a standard pair of phone wires

A cable internet service

A dial-up internet service

Answer

Correct Answer: A broadband internet-access circuit based on a standard pair of phone wires

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62. What is the full form of "DSL"?

Direct Subscriber Line

Dial Subscriber Line

Digital Subscriber Line

Dual Subscriber Line

Answer

Correct Answer: Digital Subscriber Line

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63. Drivers act as translators between which two things?

The operating system and the hardware

The CPU and the memory

The software and the drivers

The BIOS and the hardware

Answer

Correct Answer: The operating system and the hardware

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64. Which of the following is responsible for physical control of the interfaces that lead to the hardware being controlled?

Hardware

Operating System

BIOS

Drivers

Answer

Correct Answer: BIOS

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65. What does a driver do?

It allows an operating system to use a piece of hardware by providing logical control.

It provides a graphical interface for the user.

It deletes temporary files.

It manages memory and processes.

Answer

Correct Answer: It allows an operating system to use a piece of hardware by providing logical control.

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66. What is the primary function of DNS?

Enabling two devices to communicate with each other

Resolving fully-qualified domain names (FQDNs) to IP addresses.

Storing information about domain names

Translating websites from one language to another

Answer

Correct Answer: Resolving fully-qualified domain names (FQDNs) to IP addresses.

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67. What is another term for data processing?

Data analysis

Data entry

Data output

Big data

Answer

Correct Answer: Big data

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68. What is the term "console type" often used to refer to?

The type of console, such as Xbox, PlayStation, or Nintendo

The act of entering data into a computer

The process of connecting a computer to a console

The terminal type, such as VT-100, set in terminal emulation software

Answer

Correct Answer: The terminal type, such as VT-100, set in terminal emulation software

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69. What is the commonest type of console?

A device that only consists of a keyboard and a mouse.

A device that only consists of a keyboard.

A terminal which is a combination of a keyboard, a mouse and a monitor.

A device that only consists of a monitor.

Answer

Correct Answer: A terminal which is a combination of a keyboard, a mouse and a monitor.

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70. What is the reduction of the amount of data that is transmitted or stored called?

Compression

Encryption

Transmission

Decompression

Answer

Correct Answer: Compression

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71. Lossless compression is ideal for which type of data?

Lossy data

Data that can be misinterpreted

Data that must not be misinterpreted

Data that does not need to be compressed

Answer

Correct Answer: Data that must not be misinterpreted

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72. What is the common axis of rotation for the inner and outer conductors in a coaxial cable?

The inner conductor

The braided shield

The core of the cable

The outer conductor

Answer

Correct Answer: The core of the cable

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73. What is a common form of copper cabling characterized by two conductors, one inside the other?

Twisted pair cable

Fiber optic cable

Coaxial cable

Parallel cable

Answer

Correct Answer: Coaxial cable

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74. What is the most common accompaniment to the CLI?

Command Line Interface (CLI)

Text-based user interface (TUI)

Alphabetical user interface (AUI)

Graphical user interface (GUI)

Answer

Correct Answer: Graphical user interface (GUI)

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75. What is the full form of CSU/DSU?

Channel Switching Unit/Data Service Unit

Channel Service Unit/Data Service Unit

Customer Service Unit/Data Service Unit

Continuous Service Unit/Data Service Unit

Answer

Correct Answer: Channel Service Unit/Data Service Unit

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76. What is cable modem?

A device that connects a computer to the Internet

A device that modulates an analog carrier signal to encode digital information

A type of computer network

The customer premise equipment (CPE) used to send and receive internet traffic over a coaxial cable television circuit.

Answer

Correct Answer: The customer premise equipment (CPE) used to send and receive internet traffic over a coaxial cable television circuit.

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77. How many bits are in a byte?

Answer

Correct Answer: 8

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78. What is the purpose of a data buffer?

To reduce the loss of data or the variation in the rate of data transmission

To communicate data

To process data

To store data

Answer

Correct Answer: To reduce the loss of data or the variation in the rate of data transmission

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79. What advantage did bridges have over repeaters?

The ability to forward data and block data that is not meant for a different segment.

Bridges could not control the flow of data.

Bridges could not understand MAC addresses

Bridges could not process data

Answer

Correct Answer: The ability to forward data and block data that is not meant for a different segment.

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80. What does a bridge do in Ethernet?

Block data

Bridge interconnects separate network cable segments.

Manages MAC addresses

Forwards data

Answer

Correct Answer: Bridge interconnects separate network cable segments.

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81. BIOS is responsible for which of the following?

Booting from a USB drive

Updating the graphics driver

Formatting the hard drive

Orchestrating hardware registration during bootup

Answer

Correct Answer: Orchestrating hardware registration during bootup

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82. Data transmission speed is measured in ____.

Bits per second

Gigabytes

Miles per hour

Seconds

Answer

Correct Answer: Bits per second

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83. What is the unit of measure for the movement of data between devices and/or across a medium?

Samples per second (s/s or sps)

Bits per second (b/s or bps)

Hertz (Hz)

Frames per second (f/s or fps)

Answer

Correct Answer: Bits per second (b/s or bps)

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84. What is the binary numbering system?

A system that uses ten digits, 0 through 9

A system that uses eight digits, 0 through 7

A system that uses sixteen digits, 0 through F

A system that uses two digits, 0 and 1

Answer

Correct Answer: A system that uses two digits, 0 and 1

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85. What is a binary system?

A system that has two separate components

A system that has four separate components

A system that has three separate components

A system that has one separate component

Answer

Correct Answer: A system that has two separate components

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86. What does the word "binary" mean?

Referring to a system with two separate components

Characterized by having two parts

Only consisting of the numbers 1 and 2

Having one correct answer

Answer

Correct Answer: Characterized by having two parts

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87. Which of the following is not an exterior gateway protocol?

RIP

EGP

BGP4

BGP

Answer

Correct Answer: BGP4

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88. What is BGP?

The exterior gateway routing protocol used to build the routing table of the home internet.

The exterior gateway routing protocol used to build the routing table of the commercial internet.

The interior gateway routing protocol used to build the routing table of the commercial internet.

The interior gateway routing protocol used to build the routing table of the home internet.

Answer

Correct Answer: The exterior gateway routing protocol used to build the routing table of the commercial internet.

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89. Which of the following is true about baseband?

Baseband is represented by

Baseband signaling is used in Ethernet networks.

Baseband uses multiple frequencies to transmit a bitstream.

Baseband is used in WiFi networks.

Answer

Correct Answer: Baseband signaling is used in Ethernet networks.

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90. What does bandwidth refer to in communication?

The speed of the transmission

The size of the pipe

The amount of data sent

The channel occupied by the carrier

Answer

Correct Answer: The channel occupied by the carrier

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91. What is a backbone?

A media pathway of higher capacity than those used to connect end devices to the network.

A device that offers connectivity to end devices in a star-wired infrastructure.

A device that connects end devices to a network.

A media pathway of lower capacity than those used to connect end devices to the network.

Answer

Correct Answer: A media pathway of higher capacity than those used to connect end devices to the network.

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92. Attenuation is often measured in which unit?

Megabytes (MB)

Kilometers (km)

Decibels (dB)

Gigabytes (GB)

Answer

Correct Answer: Decibels (dB)

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93. Attenuation _____.

Only results from natural resistance in the wired or wireless channel

Is often measured in decibels (dB)

Results from natural resistance in the wired or wireless channel and from other environmental factors.

Is the loss of signal strength along a communications pathway

Answer

Correct Answer: Results from natural resistance in the wired or wireless channel and from other environmental factors.

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94. What is the main advantage of asynchronous communication?

The ability to transmit data using a common clock signal.

The ability to transmit data without using a common clock signal.

The ability to periods of no communication at all.

The ability to vary the rate of bit transmission.

Answer

Correct Answer: The ability to vary the rate of bit transmission.

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95. What is asynchronous communication?

A data communication method between two devices that is achieved without using a common data signal.

A data communication method between two devices that is achieved without using a common clock signal.

A data communication method between two devices that is achieved using a common clock signal.

Data communication method that uses a common clock signal.

Answer

Correct Answer: A data communication method between two devices that is achieved without using a common clock signal.

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96. What is an ASIC?

A computer chip designed for a specific use

A field-programmable gate array

A programmable logic device

A microprocessor

Answer

Correct Answer: A computer chip designed for a specific use

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97. What is ASCII?

American Standard Code for Information Interchange

American Standard Code for Internal Interchange

Assigned Standard Code for Information Interchange

American Standard Code for Impacts and Interchanges

Answer

Correct Answer: American Standard Code for Information Interchange

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98. What does AS stand for in networking?

Autonomous System

Amplitude Shift

Automatic Switching

Analog Signal

Answer

Correct Answer: Autonomous System

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99. What does an antenna do?

Controls the radio waves

Stores radio waves

Converts between radio waves and electrical current

Increases radio waves

Answer

Correct Answer: Converts between radio waves and electrical current

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100. Why is it difficult to precisely transmit analog signals?

They must be transmitted all the way to the target exactly as produced.

They require filters and shields to be implemented.

They are often represented as a sine wave.

They are susceptible to attenuation and external noise influence.

Answer

Correct Answer: They are susceptible to attenuation and external noise influence.

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Astronautical Engineering MCQs | Topic-wise

MCQ on Aerodynamics	MCQ on Aerospace Propulsion
MCQ on Basic Astronautical Engineering	MCQ on Communication Systems and Networks
MCQ on Computational Modeling	MCQ on Decision Making
MCQ on Digital Systems Laboratory	MCQ on Estimation and Control
MCQ on Experimental Projects	MCQ on Feedback Control Systems
MCQ on Flight Vehicle Engineering	MCQ on Human Systems Engineering
MCQ on Materials and Structures	MCQ on Principles of Autonomy
MCQ on Real-Time Systems and Software	MCQ on Robotics
MCQ on Space Systems Development	MCQ on Space Systems Engineering
MCQ on Structural Mechanics	General Astronautical Engineering MCQs