Introduction to Computer Networks: Master the Fundamentals of Network Architectures, Protocols, and Security

Question 1

In the TCP/IP model, which layer is NOT present?

Accepted Answer

Presentation

Answer

Application

Answer

Transport

Answer

Network

Question 2

What is the primary purpose of a MAC address?

Accepted Answer

To uniquely identify a network device

Answer

To route traffic between networks

Answer

To provide security for network communication

Answer

To convert between analog and digital signals

Question 3

Which network topology arranges devices in a star-shaped pattern?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 4

What is the main function of a router?

Accepted Answer

To connect different networks

Answer

To connect devices within a LAN

Answer

To provide security for network communication

Answer

To convert between different types of network protocols

Question 5

What is the primary role of the DNS protocol?

Accepted Answer

To translate domain names into IP addresses

Answer

To provide secure communication over networks

Answer

To route traffic between networks

Answer

To detect and prevent network attacks

Question 6

What is the difference between a WAN and a LAN?

Accepted Answer

WANs connect devices over larger distances, while LANs connect devices within a smaller area

Answer

LANs connect devices over larger distances, while WANs connect devices within a smaller area

Answer

WANs are more secure than LANs

Answer

LANs are more reliable than WANs

Question 7

What is the main purpose of a firewall in a network security system?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and remove malware

Answer

To encrypt network traffic

Answer

To provide a secure connection between two networks

Question 8

Which characteristic is a key feature of the TCP/IP reference model?

Accepted Answer

Hierarchical structure for network protocols

Answer

Exclusive support for wired network connections

Answer

Primary reliance on the UDP transport protocol

Answer

Exclusive usage in enterprise-level networks

Question 9

Discuss the various network security measures and evaluate their effectiveness in protecting against cyber threats.

Accepted Answer

Encryption and Firewalls

Accepted Answer

Antivirus and IDS

Accepted Answer

VPN and Access Control

Question 10

What is the purpose of using a network mask?

Accepted Answer

To determine the network portion of an IP address

Answer

To route network traffic efficiently

Answer

To enhance network security

Answer

To translate domain names to IP addresses

Question 11

Which type of network topology involves connecting all devices to a central hub?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 12

What is the main function of a firewall in a network?

Accepted Answer

To prevent unauthorized access

Answer

To connect separate networks

Answer

To store and relay data

Answer

To resolve domain names

Question 13

For secure web browsing, which protocol is used?

Accepted Answer

HTTPS

Answer

HTTP

Answer

FTP

Answer

TCP

Question 14

What is the purpose of a MAC (Media Access Control) address?

Accepted Answer

To uniquely identify a device on a network

Answer

To facilitate network traffic routing

Answer

To enhance network security

Answer

To translate domain names

Question 15

What is the function of a DNS (Domain Name System) server?

Accepted Answer

To convert domain names to their corresponding IP addresses

Answer

To route traffic between networks

Answer

To provide enhanced network security

Answer

To store and forward data

Question 16

Which network architecture consists of interconnected devices without a centralized authority, and devices communicate directly with each other?

Accepted Answer

Peer-to-peer

Answer

Client-server

Answer

Bus topology

Answer

Star topology

Question 17

Within the TCP/IP model, which layer is responsible for ensuring reliable data delivery?

Accepted Answer

Transport Layer

Answer

Network Access Layer

Answer

Internet Layer

Answer

Application Layer

Question 18

What is the primary purpose of a firewall in a network security system?

Accepted Answer

To filter and block unauthorized data

Answer

To monitor network activity

Answer

To connect different networks

Answer

To facilitate remote access

Question 19

Which protocol is predominantly used for accessing and displaying web pages?

Accepted Answer

HTTP

Answer

FTP

Answer

SMTP

Answer

DNS

Question 20

What is the main function of a router within a network?

Accepted Answer

Directing data packets between different networks

Answer

Connecting devices on the same network

Answer

Providing internet connectivity

Answer

Storing and retrieving data

Question 21

Which encryption algorithm is widely employed to safeguard data confidentiality in computer networks?

Accepted Answer

AES

Answer

DES

Answer

RSA

Answer

MD5

Question 22

What is the primary purpose of utilizing a VPN (Virtual Private Network)?

Accepted Answer

Enabling secure remote access

Answer

Monitoring network activity

Answer

Backing up and restoring data

Answer

Facilitating web browsing

Question 23

What is the key distinction between a TCP connection and a UDP connection?

Accepted Answer

TCP provides reliable data transmission while UDP does not.

Answer

UDP is faster than TCP.

Answer

TCP is used for real-time applications while UDP is used for non-real-time applications.

Answer

TCP and UDP use different port numbers.

Question 24

What is the main purpose of a MAC (Media Access Control) address?

Accepted Answer

To uniquely identify a device on a network

Answer

To route data packets between networks

Answer

To provide internet access

Answer

To encrypt data

Question 25

Which layer in the TCP/IP model is responsible for routing data packets?

Accepted Answer

Network

Answer

Application

Answer

Transport

Answer

Data Link

Question 26

What is the main purpose of using a subnet mask?

Accepted Answer

To identify the network portion and host portion of an IP address

Answer

To determine the maximum number of hosts on a subnet

Answer

To prevent unauthorized access to a network

Answer

To improve network performance

Question 27

Which network topology involves connecting all devices to a central hub?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 28

What is the primary function of a network firewall?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and remove malware

Answer

To improve network performance

Answer

To provide encryption for data transfers

Question 29

Which protocol is commonly used to transfer files over the internet?

Accepted Answer

FTP

Answer

HTTP

Answer

SMTP

Answer

DNS

Question 30

What is the primary purpose of a VPN (Virtual Private Network)?

Accepted Answer

To provide a secure and encrypted connection over a public network

Answer

To enhance network speed and performance

Answer

To block unauthorized access to a network

Answer

To provide remote access to network resources

Question 31

Which protocol is designed to establish and maintain reliable connections, ensuring the successful transmission of data over the internet?

Accepted Answer

Transmission Control Protocol (TCP)

Answer

User Datagram Protocol (UDP)

Answer

File Transfer Protocol (FTP)

Answer

Hypertext Transfer Protocol (HTTP)

Question 32

Which layer in the TCP/IP model is responsible for addressing and routing packets?

Accepted Answer

Network

Answer

Application

Answer

Transport

Answer

Data Link

Question 33

What is the primary purpose of a MAC address?

Accepted Answer

To identify a specific device on a network segment

Answer

To establish a connection between two devices on the internet

Answer

To route traffic between different networks

Answer

To protect data from unauthorized access

Question 34

Which of the following is NOT a type of network security threat?

Accepted Answer

Firewall

Answer

Malware

Answer

Phishing

Answer

DDoS attack

Question 35

Which protocol is used to send email messages over the internet?

Accepted Answer

SMTP

Answer

HTTP

Answer

FTP

Answer

DNS

Question 36

What is the primary role of a router in a network?

Accepted Answer

To connect different networks and forward data packets

Answer

To connect devices on the same network segment

Answer

To provide security for the network

Answer

To store and retrieve data

Question 37

What is the main purpose of a firewall in a network?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and remove malware

Answer

To encrypt data

Answer

To improve network performance

Question 38

Which of the following is NOT a type of wireless network?

Accepted Answer

Ethernet

Answer

Wi-Fi

Answer

Bluetooth

Answer

Cellular

Question 39

What's the main purpose of network configuration? Give an example of how it's used in practice.

Accepted Answer

Setting up and managing network settings to ensure communication and data transfer.

Answer

Implementing security measures to protect data from outside threats.

Answer

Monitoring network performance and fixing problems.

Answer

Creating a smooth connection between all devices on a network.

Question 40

Which network architecture model is characterized by a central authority that controls all network resources and devices?

Accepted Answer

Hierarchical

Answer

Ring

Answer

Peer-to-Peer

Answer

Bus

Question 41

Which protocol layer in the TCP/IP model is responsible for providing reliable data transfer over a network?

Accepted Answer

Transport

Answer

Application

Answer

Data Link

Answer

Network

Question 42

Which security mechanism ensures the confidentiality of data by converting it into an unreadable format before it is transmitted over a network?

Accepted Answer

Cryptography

Answer

Firewalls

Answer

Authentication

Answer

Intrusion Detection Systems

Question 43

Which type of network topology consists of a single point of failure if the central hub fails?

Accepted Answer

Star

Answer

Ring

Answer

Bus

Answer

Mesh

Question 44

Which network device connects two or more networks with different protocols, allowing them to communicate and exchange data?

Accepted Answer

Router

Answer

Bridge

Answer

Hub

Answer

Switch

Question 45

Which addressing scheme in IPv6 assigns a unique 128-bit address to each device on a network?

Accepted Answer

EUI-64

Answer

IP

Answer

MAC

Answer

DNS

Question 46

Which network performance metric measures the time it takes for data to travel a specified distance on a network?

Accepted Answer

Latency

Answer

Bandwidth

Answer

Throughput

Answer

Jitter

Question 47

Which cloud computing service model provides users with access to pre-built and pre-configured software applications?

Accepted Answer

Software as a Service (SaaS)

Answer

Platform as a Service (PaaS)

Answer

Backend as a Service (BaaS)

Answer

Infrastructure as a Service (IaaS)

Question 48

Which network management protocol is widely used to remotely monitor and manage network devices and collect performance data?

Accepted Answer

Simple Network Management Protocol (SNMP)

Answer

SSH

Answer

Telnet

Answer

TFTP

Question 49

What is the primary function of a router in a computer network?

Accepted Answer

To forward data packets between different networks.

Answer

To run network applications.

Answer

To store data.

Answer

To provide a physical connection between devices.

Question 50

Which of the following is a common network topology?

Accepted Answer

Bus

Answer

Firewall

Answer

Protocol

Answer

Cloud

Question 51

What is the primary purpose of a firewall in a computer network?

Accepted Answer

To prevent unauthorized access to a network.

Answer

To run network applications.

Answer

To connect different networks.

Answer

To store data.

Question 52

Which of the following is a defining characteristic of a client-server network architecture?

Accepted Answer

The client requests services from the server.

Answer

There is no central authority.

Answer

Data is stored on the client.

Answer

All devices are equal.

Question 53

What is the primary function of a MAC address in a computer network?

Accepted Answer

To uniquely identify a device.

Answer

To connect different networks.

Answer

To run network applications.

Answer

To store data.

Question 54

Which of the following is an example of a network protocol?

Accepted Answer

HTTP

Answer

Router

Answer

Firewall

Answer

Server

Question 55

What is the primary purpose of a subnet mask in a computer network?

Accepted Answer

To divide a network into smaller subnetworks.

Answer

To store data.

Answer

To run network applications.

Answer

To connect different networks.

Question 56

Which of the following is a common type of network security threat?

Accepted Answer

Malware

Answer

Protocol

Answer

Firewall

Answer

Router

Question 57

What is the primary function of a domain name system (DNS) in a computer network?

Accepted Answer

To translate domain names into IP addresses.

Answer

To store data.

Answer

To run network applications.

Answer

To connect different networks.