Computer Networks Quizzes: Test Your Knowledge

Question 1

Which principles form the foundation of network security, safeguarding networks and data from unauthorized access and breaches?

Accepted Answer

Confidentiality, Integrity, Availability, and Authentication (CIAA)

Answer

Encryption, Firewall, Antivirus, and Virtual Private Network (VPN)

Answer

Access Control, Patch Management, Intrusion Detection, and Security Monitoring

Answer

Risk Assessment, Threat Analysis, Vulnerability Management, and Incident Response

Question 2

Which factors primarily influence the performance of a computer network?

Accepted Answer

Network architecture, bandwidth, latency, and traffic patterns combined

Answer

Network architecture alone

Answer

Bandwidth only

Answer

Latency and traffic patterns only

Question 3

What is the purpose of Quality of Service (QoS) in network management, and how does it prioritize critical network traffic?

Accepted Answer

QoS prioritizes critical network traffic to ensure optimal performance for essential applications.

Answer

QoS is a routing protocol that directs network traffic to its destination.

Answer

QoS is a security measure that prevents unauthorized access and protects against cyber threats.

Question 4

Which mitigation strategy is most effective for each network security vulnerability?

Accepted Answer

SQL injection: Input validation; Cross-site scripting (XSS): Web application firewall (WAF)

Answer

SQL injection: Secure coding framework; Cross-site scripting (XSS): Regular security patching

Answer

SQL injection: Network segmentation; Cross-site scripting (XSS): Intrusion detection systems (IDS)

Answer

SQL injection: Content delivery network (CDN); Cross-site scripting (XSS): Multi-factor authentication (MFA)

Question 5

Compare and contrast the characteristics, advantages, and disadvantages of Wi-Fi and Bluetooth, two widely used wireless networking technologies.

Accepted Answer

Wi-Fi offers higher bandwidth and a larger coverage area, while Bluetooth is more energy-efficient and suitable for short-range connections.

Answer

Bluetooth offers higher bandwidth and a wider coverage area than Wi-Fi.

Answer

Wi-Fi is more energy-efficient than Bluetooth and is suitable for short-range connections.

Answer

Wi-Fi and Bluetooth technologies are identical in their features and capabilities.

Question 6

Analyze the differences between distance vector and link-state routing protocols. Explain how their distinct characteristics affect network performance and reliability.

Accepted Answer

Distance vector protocols maintain a table of distances to destinations, while link-state protocols maintain a complete network topology map.

Accepted Answer

Link-state protocols enhance reliability by providing a comprehensive view of the network topology.

Answer

Distance vector protocols are less efficient than link-state protocols due to their limited routing table size.

Question 7

A company's network users can access internal resources but cannot connect to the internet. What is the first troubleshooting step to take to identify the root cause?

Accepted Answer

Ping the default gateway and then a known external IP address.

Answer

Check the network adapter settings on each user's computer.

Answer

Reboot all network devices, including routers and switches.

Answer

Contact the internet service provider (ISP) to report the issue.

Question 8

Which layer in the TCP/IP model is responsible for establishing and maintaining connections between network devices?

Accepted Answer

Transport layer

Answer

Network layer

Answer

Application layer

Answer

Physical layer

Question 9

Which security measure involves creating a secure channel for data transmission between devices?

Accepted Answer

Encryption

Answer

Authentication

Answer

Authorization

Answer

Firewalling

Question 10

Which protocol is used to send and receive web pages between a browser and a web server?

Accepted Answer

HTTP

Answer

TCP

Answer

UDP

Answer

FTP

Question 11

What is the function of a router in a network?

Accepted Answer

Route data packets between networks

Answer

Connect devices to a network

Answer

Provide a secure connection between networks

Answer

Store user data

Question 12

What is the purpose of a subnet mask?

Accepted Answer

To divide a network into smaller subnetworks

Answer

To assign IP addresses to devices on a network

Answer

To establish connections between networks

Answer

To protect a network from unauthorized access

Question 13

Which of the following is an advantage of using a mesh network topology?

Accepted Answer

Improved reliability

Answer

Increased bandwidth

Answer

Reduced latency

Answer

Ease of configuration

Question 14

What is the main purpose of a MAC address in a network?

Accepted Answer

To uniquely identify a network device

Answer

To route data packets between networks

Answer

To provide a secure connection between devices

Answer

To store application data

Question 15

Which protocol is used to establish secure connections between a web browser and an e-commerce website?

Accepted Answer

HTTPS

Answer

HTTP

Answer

FTP

Answer

SSL

Question 16

Which protocol is used to establish and maintain reliable connections in a network?

Accepted Answer

TCP

Answer

IP

Answer

UDP

Answer

HTTP

Question 17

Which network security measure involves restricting access to authorized users?

Accepted Answer

Authentication

Answer

Encryption

Answer

Firewall

Answer

VPN

Question 18

Which advantage do wireless networks offer?

Accepted Answer

Increased mobility

Answer

Reduced setup costs

Answer

Enhanced performance

Answer

Improved security

Question 19

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

Accepted Answer

To divide a network into smaller segments

Answer

To specify the default gateway

Answer

To determine the IP address range

Answer

To enhance network security

Question 20

Which aspect of the cloud computing model is NOT a characteristic?

Accepted Answer

Full control over infrastructure

Answer

On-demand availability

Answer

Multi-tenancy

Answer

Broad network access

Question 21

Which type of network security threat involves an attacker impersonating another user or entity?

Accepted Answer

Phishing

Answer

Malware

Answer

Denial-of-service attack

Answer

SQL injection

Question 22

Which of the following is an example of a Wide Area Network (WAN)?

Accepted Answer

The Internet

Answer

Local Area Network (LAN)

Answer

Wireless Fidelity (Wi-Fi)

Answer

Bluetooth

Question 23

What is the primary purpose of a MAC address?

Accepted Answer

To uniquely identify a specific device on a network

Answer

To route network traffic efficiently

Answer

To provide encryption for data transmission

Answer

To store user data and preferences

Question 24

What is the key difference between a router and a switch in a network infrastructure?

Accepted Answer

Routers connect different networks, while switches connect devices within a single network

Answer

Switches are faster than routers in data transfer

Answer

Routers are typically more expensive than switches

Answer

Routers and switches perform identical functions

Question 25

What is the primary role of the International Organization for Standardization (ISO) in the context of network standardization?

Accepted Answer

To develop and maintain international standards for network technologies and protocols

Answer

To provide training and certification for network professionals

Answer

To regulate the use of the internet

Answer

To promote research and innovation in networking

Question 26

In a home network, which topology has a central hub connecting all devices?

Accepted Answer

Star topology

Answer

Bus topology

Answer

Mesh topology

Answer

Ring topology

Question 27

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

Accepted Answer

Network layer

Answer

Application layer

Answer

Transport layer

Answer

Physical layer

Question 28

Which security measure protects data by encrypting it?

Accepted Answer

Encryption

Answer

Authentication

Answer

Firewall

Answer

Antivirus software

Question 29

What is the primary purpose of a MAC address?

Accepted Answer

Identifies a specific device on a network

Answer

Assigns a unique IP address to a device

Answer

Determines the network protocol used

Answer

Controls access to a network

Question 30

Which type of network spans wide areas, connecting devices over cities or countries?

Accepted Answer

WAN

Answer

LAN

Answer

PAN

Answer

MAN

Question 31

What is the main function of a network firewall?

Accepted Answer

Filters incoming and outgoing network traffic

Answer

Encrypts data before transmission

Answer

Provides a user interface for network management

Answer

Stores user credentials securely

Question 32

Which network protocol is commonly used to transfer files between computers?

Accepted Answer

FTP

Answer

HTTP

Answer

SMTP

Answer

SSH

Question 33

In a peer-to-peer network, which of the following is a key characteristic?

Accepted Answer

Each device can act as both a client and a server

Answer

A centralized server manages network resources

Answer

All devices are connected to a central hub

Answer

Only one device can access the network at any given time

Question 34

What is the main purpose of a DNS server?

Accepted Answer

Translates domain names into their corresponding IP addresses

Answer

Stores user passwords securely

Answer

Provides access to websites and online content

Answer

Protects networks from malicious software

Question 35

Which network topology arranges devices in a linear or bus-like structure?

Accepted Answer

Bus

Answer

Star

Answer

Ring

Answer

Mesh

Question 36

In the TCP/IP model, which layer is responsible for directing packets along a network?

Accepted Answer

Network

Answer

Application

Answer

Transport

Answer

Link

Question 37

Which network security approach involves encrypting data during transmission?

Accepted Answer

Encryption

Answer

Firewalls

Answer

Authentication

Answer

Intrusion Detection Systems

Question 38

Which characteristic is NOT associated with a Wide Area Network (WAN)?

Accepted Answer

Typically connects devices within a single building

Answer

Spans a large geographical area

Answer

Employs high-speed connections

Answer

Examples include the Internet and leased lines

Question 39

What is a primary function of a proxy server?

Accepted Answer

Acting as an intermediary for client-server communication

Answer

Detecting and blocking malicious traffic

Answer

Providing backup in case of network outages

Answer

Translating domain names into IP addresses

Question 40

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

Accepted Answer

Preventing unauthorized access to the network

Answer

Monitoring network traffic for suspicious activity

Answer

Encrypting data during transmission

Answer

Providing redundancy in case of network failures

Question 41

Consider a network topology where each device is connected to a central hub. Which topology is being described?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 42

Which network protocol is primarily responsible for ensuring reliable data transmission across a network?

Accepted Answer

TCP

Answer

IP

Answer

HTTP

Answer

DNS

Question 43

Which type of network security measure aims to block unauthorized access to network resources?

Accepted Answer

Firewalls

Answer

Antivirus software

Answer

Encryption

Answer

Backups

Question 44

In a client-server network architecture, which component is responsible for providing services and managing data?

Accepted Answer

Server

Answer

Client

Answer

Router

Answer

Switch

Question 45

Which of the following is the process of dividing a network into smaller, manageable subnetworks?

Accepted Answer

Subnetting

Answer

VLANs

Answer

Routing

Answer

Bridging

Question 46

Which wireless network standard provides the highest data transfer speeds and supports the most devices?

Accepted Answer

802.11ac

Answer

802.11b

Answer

802.11g

Answer

802.11n

Question 47

Which network device is used to connect multiple networks and route traffic between them?

Accepted Answer

Router

Answer

Switch

Answer

Modem

Answer

Firewall

Question 48

Which security threat involves sending fraudulent emails to trick users into revealing personal information?

Accepted Answer

Phishing

Answer

Malware

Answer

DoS attack

Answer

Ransomware

Question 49

Which network topology is simple and cost-effective?

Accepted Answer

Bus topology

Answer

Ring topology

Answer

Star topology

Answer

Mesh topology

Question 50

What is the primary function of a network protocol?

Accepted Answer

Establish communication rules

Answer

Manage data flow

Answer

Encrypt data

Answer

Troubleshoot network issues

Question 51

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

Accepted Answer

Prevent unauthorized access

Answer

Translate network addresses

Answer

Store data securely

Answer

Monitor network traffic

Question 52

What is the main purpose of a MAC address?

Accepted Answer

Unique identification of network devices

Answer

Storage of IP addresses

Answer

Control of data flow

Answer

Encryption of data

Question 53

In which network topology does a central node connect all other nodes?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 54

What is the primary purpose of a subnet mask?

Accepted Answer

To differentiate between the network and host portions of an IP address

Answer

To determine the default gateway for a network

Answer

To assign IP addresses to network devices

Answer

To prevent unauthorized access to a network

Question 55

Which protocol is specifically designed for email delivery?

Accepted Answer

SMTP

Answer

HTTP

Answer

FTP

Answer

DNS

Question 56

What is the key distinction between a router and a switch?

Accepted Answer

A router connects networks, while a switch connects devices within a network

Answer

A switch connects networks, while a router connects devices within a network

Answer

They both perform the same function

Answer

They are both types of firewalls

Question 57

What differentiates a wired network from a wireless network?

Accepted Answer

Wired networks use physical cables, while wireless networks use radio waves.

Answer

Wireless networks are inherently faster than wired networks.

Answer

Wireless networks provide greater security than wired networks.

Answer

There is no fundamental difference between wired and wireless networks.

Question 58

Which of the following is NOT a factor that influences network performance?

Accepted Answer

Operating system version

Answer

Bandwidth

Answer

Latency

Answer

Packet size

Question 59

In which network topology are all devices connected to a central hub?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 60

Which essential network protocol is responsible for establishing and maintaining communication between devices on a network?

Accepted Answer

TCP

Answer

HTTP

Answer

DNS

Answer

FTP

Question 61

What type of network connects devices within a limited geographical area, such as within a building?

Accepted Answer

LAN

Answer

WAN

Answer

MAN

Answer

VPN

Question 62

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

Accepted Answer

To uniquely identify a device on the network

Answer

To provide a secure connection

Answer

To route data packets

Answer

To store user data

Question 63

Which type of network security threat involves unauthorized access to a computer system?

Accepted Answer

Hacking

Answer

Malware

Answer

Phishing

Answer

DoS attack

Question 64

What is the purpose of a network mask?

Accepted Answer

To identify the network portion of an IP address

Answer

To provide a secure connection

Answer

To route data packets

Answer

To filter network traffic